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International Conference Presentations and Proceedings

2016

1.Il Yong Choi, Tae Hwa Jeon, Wonyong Choi, Jong Kyu Kim "Tin Oxide Nanohelix Structures with Thin Iron Oxide Layer for Efficient Photoelectrochemical Water Splitting" 2016 MRS Fall Meeting, Boston, USA, November 27~December 2 (2016).

2. Xinjian Shi, Hokyeong Jeong, Seungjae Oh, Ming Ma, Kan Zhang, Jeong Kwon, In Taek Choi , Il Yong Choi, Hwan Kyu Kim, Jong Kyu Kim, Jong Hyeok Park "Unassisted Photoelectrochemical Water Splitting Exceeding 7% Solar-to-Hydrogen Conversion Efficiency Using Photon Recycling" 2016 MRS Fall Meeting, Boston, USA, November 27~December 2 (2016).

3. Il Yong Choi, Tae Hwa Jeon, Wonyong Choi, and Jong Kyu Kim "Tin oxide nanohelix structures with thin iron oxide layer for efficient photoelectrochemical water splitting" International Conference on Electronic Materials and Nanotechnology for Green Environment (ENGE 2016) Ramada Plaza Jeju Hotel, Jeju, South Korea Nov.06 ~ 09 (2016)

4. Sunyong Hwang, Nam Han, Hokyeong Jeong, Jun Hyuk Park, Seung Hyuk Lim, Jong Hoi Cho, Yong Hoon Cho, Hyeon Jun Jeong, Mun Seok Jeong, and Jong Kyu Kim " Facet-dependent optical properties and carrier recombination behavior of hendeca-facet panchromatic light emitter" International Workshop on Nitride Semiconductors (IWN 2016), Orlando, Florida, USA, Oct 2~7 (2016).

5. Jun Hyuk Park, Jong Won Lee, Dong Yeong Kim, Jaehee Cho, E. Fred Schubert, and Jong Kyu Kim "External quantum efficiency variation on temperature and current density in red, blue, and deep ultraviolet light-emitting diodes" International Workshop on Nitride Semiconductors (IWN 2016), Orlando, Florida, USA, Oct 2~7 (2016)

6. Jong Won Lee, Jun Hyuk Park, Dong Yeong Kim, E. Fred Schubert, Jungsub Kim, Jinsub Lee, Yong-Il Kim, Youngsoo Park, and Jong Kyu Kim "Preferential Outcoupling of Strong in-Plane Emission from AlGaN-based Deep-Ultraviolet Light-Emitting Diodes" International Workshop on Nitride Semiconductors (IWN 2016), Hilton Orlando Lake Buena Vista, Orlando, Florida, USA, October 2 ~ 7 (2016)

7. Sunyong Hwang, Nam Han, DongYeong Kim, Hokyeong Jeong, Jae Won Kim, Kyung Song, Si-Yong Choi, and Jong Kyu Kim "Wafer-scale growth and characterization of multi –layer h-BN by metal-organic chemical vapor deposition" The 8th International Conference on Recent Progress in Graphene/2D Research (RPGR 2016), Sungkyunkwan University, Seoul, Korea, September 25-29 (2016)

8. [Invited] Jong Kyu Kim, Jong Won Lee, Dong-Yeong Kim, Jun Hyuk Park "An elegant route to overcome fundamentally-limited light extraction in AlGaN deep-ultraviolet light-emitting diodes: preferential outcoupling of strong in-plane emission" SPIE OPTICS+PHOTONICS. 2016, San Diego, California, USA, August 28 ~ September 1 (2016).

9. Kim Dong Yeong Kim, Guan-Bo Lin, Sunyong Hwang, Jun Hyuk Park, David Meyaard, E. Fred. Schubert, Han-Youl Ryu, and Jong Kyu Kim "Polarization-Engineered High-Efficiency III-Nitride-based Light-Emitting Diodes Optimized by Genetic Algorithm" The 15th Joint Symposium on the MSE for the 21st Century, Dream Center, Gyeongju, Korea, August 28-31 (2016)

10. Jun Hyuk Park, Guan-Bo Lin, Dong Yeong Kim, Jong Won Lee, Jaehee Cho, Jungsub Kim, E. Fred Schubert and Jong Kyu Kim "U-shape efficiency-versus-current curves in AlGaN-based deep-ultraviolet light-emitting diodes " The 15th Joint Symposium on MSE for the 21st Century, Dream Center, Gyeongju, Korea, August 28-31 (2016)

11. [Invited] Jong Kyu Kim "Nanostructured Thin-film Materials Fabricated by Oblique Angle Deposition and Their Applications" The 37th Progress In Electromagnetics Research Symposium (PIERS 2016), Shanghai, China, August 8 ~ 11 (2016)

12. J. W. Lee, D. Y. Kim, J. H. Park, D. Lee, J. Jang, I.-S. Shin, L. Jin, G.-D. Lee, E. F. Schubert, H.-S. Noh, J. Kim, J. Lee, Y. Kim. Y. Park, Y. Park, Euijoon Yoon, and Jong Kyu Kim "Elegant routes to overcome fundamentally-limited light extraction in AlGaN deep-ultraviolet light-emitting diodes" The International Workshop on UV Materials and Devices(IWUMD-2016) Beijing, China, July, 27-31 (2016)

13. Sunyong Hwang, Nam Han, DongYeong Kim, Hokyeong Jeong, Jae Won Kim, Seung Hee Lee, Kyung Song, Si-Yong Choi, and Jong Kyu Kim "Wafer-scale growth and characterization of multi –layer h-BN by metal-organic chemical vapor deposition" The International Workshop on UV Materials and Devices(IWUMD-2016) Beijing, China, July, 27-31 (2016)

14. Jong Won Lee, Jun Hyuk Park, Dong Yeong Kim, E. Fred Schubert, Jungsub Kim, Jinsub Lee, Yong-Il Kim, Youngsoo Park, and Jong Kyu Kim Micro-dot deep ultraviolet light-emitting diodes for enhanced out-coupling efficiency The International Workshop on UV Materials and Devices(IWUMD-2016) Beijing, China, July, 27-31 (2016)

15. Hyunah Kwon, Yuna Lee, Sunyong Hwang, Jong Kyu Kim "Ultrasensitive hydrogen sensor operating at room temperature by Pt/TiO2 nanoscale Schottky contacts" The 16th International meeting on chemical sensors(IMCS 2016), Jeju island, Korea, July 10~13 (2016)

16. Yuna Lee, Hyunah Kwon, Sunyong Hwang, Jong Kyu Kim "N-type sensing behavior in P-type NiO gas sensor by modifying contact properties" The 16th International meeting on chemical sensors(IMCS 2016), Jeju island, Korea, July 10~13 (2016)

17. [Invited] Jong Won Lee, Dong Yeong Kim, Jun Hyuk Park, E. Fred Schubert, Jungsub Kim, Jinsub Lee, Yongil Kim, Youngsoo Park and Jong Kyu Kim "Preferential Outcoupling of Strong in-Plane Emission from AlGaN-based Deep-Ultraviolet Light-Emitting Diodes" The 4th International Conference on Light-Emitting Devices and Their Industrial Applications (LEDIA 2016), Pacifico Yokohama, Kanagawa, Japan, May 18 ~ 20 (2016)

2015

1. Byeong Uk Ye Ji-hyun Kim, Jae won Lee, Joonmo Park, Chul Jong Yoo, Buem Joon Kim, Hu Young Jeong, Jin-Hoe Hur, Jong Kyu Kim, Jong-Lam Lee, Jeong Min Baik "Visible Color Tunable Emission in Three-dimensional Light Emitting Diodes by MgO Passivation of Pyramid Tip" The 3th International Conference on Advanced Electromaterials(ICAE 2015), ICC Jeju, Korea, November 17~20 (2015)

2. Guan-Bo Lin, Xiaoguang Zhang , Soo Min Lee, George Papasouliotis, Jong Kyu Kim, E. Fred Schubert, Jaehee Cho "The effect of a GaInN spacer layer on the efficiency droop of GaN-based light-emitting diodes" The 3th International Conference on Advanced Electromaterials(ICAE 2015), ICC Jeju, Korea, November 17~20 (2015)

3. [Invited] Jong Won Lee, Jun Hyuk Park, Dong Yeong Kim,  Jungsub Kim, E. Fred Schubert and Jong Kyu Kim "Enhancement in light-extraction efficiency of sidewall-emission-enhanced deep ultraviolet light-emitting diodes" The 3th International Conference on Advanced Electromaterials(ICAE 2015), ICC Jeju, Korea, November 17~20 (2015)

4. Sunyong Hwang, Dong Yeong Kim, Jun Hyuk Park, Han-Youl Ryu, and Jong Kyu Kim "Modulation of hole-injection in GaInN light emitting triodes and its effect on carrier recombination behavior" The 6th International Symposium on Growth of III-Nitrides (ISGN-6), Hamamatsu, Japan, Nov 8~13 (2015)

5. Dong Yeong Kim, Guan-Bo Lin, Sunyong Hwang, Jun Hyuk Park, David Meyaard, E. Fred. Schubert, Han-Youl Ryu and Jong Kyu Kim "Polarization-Engineered High-Efficiency III-Nitride-based Light-Emitting Diodes Optimized by Genetic Algorithm" The 6th International Symposium on Growth of III-Nitrides (ISGN-6), Hamamatsu, Japan, Nov 8~13 (2015)

6. [Invited] Jong Won Lee, Jun Hyuk Park, Dong Yeong Kim, Jungsub Kim, Yong-Il Kim, Youngsoo Park, E. Fred Schubert and Jong Kyu Kim "Overcoming the fundamental limitation in light-extraction efficiency of deep ultraviolet light-emitting diodes by utilizing transverse-magnetic-dominant emission" 11th International Conference On Nitride Semiconductors (ICNS-11), Beijing, China, August 30-September 4 (2015)

7. Jun Hyuk Park, Guan-Bo Lin, Dong Yeong Kim, Jong Won Lee, Jaehee Cho, E. Fred Schubert, Jong Kyu Kim "U-shape efficiency-versus-current curves in AlGaN-based deep-ultraviolet light-emitting diodes" 11th International Conference On Nitride Semiconductors (ICNS-11), Beijing, China, August 30-September 4 (2015)

8. Jun Hyuk Park, Guan-Bo Lin, Dong Yeong Kim, Jong Won Lee, Jaehee Cho, E. Fred Schubert, Jong Kyu Kim "U-shape phenomenon in the efficiency-versus-current curves in AlGaN-based deep-ultraviolet light-emitting diodes" The 11th conference on Lasers and electro-optics pacific rim (CLEO-PR 2015), Busan, Korea, August 24-August 28 (2015)

9. Jong Won Lee, Jun Hyuk Park, Dong Yeong Kim, Jungsub Kim, E. Fred Schubert, and Jong Kyu Kim "Enhanced light extraction efficiency of AlGaN based deep-ultraviolet light-emitting diodes by utilizing strong sidewall emission" The 11th conference on Lasers and electro-optics pacific rim (CLEO-PR 2015), Busan, Korea, August 24-August 28 (2015)

10. [Invited] Jong Won Lee, Dong Yeong Kim, Jun Hyuk Park, Jungsub Kim, Yong-Il Kim, Youngsoo Park, E. Fred Schubert and Jong Kyu Kim "Enhancement in light-extraction efficiency of deep ultraviolet light-emitting diodes by utilizing transverse-magnetic-dominant emission" the 15th International Meeting on Information Display (IMID 2015) EXCO, Daegu, Korea August 18 ~21 (2015)

11. Jaehee Cho, Jong Kyu Kim, and E. Fred Schubert "On the Temperature Dependence of Efficiency in III-nitride Light-emitting Diodes" ICMAT2015&IUMRS-ICA2015, Suntec Singapore, June 28 ~ July 3 (2015)

12. Il Yong Choi, Xinjian Shi, Tae Hwa Jeon, Kan Zhang, Jeong Kwon, Dong Yeong Kim, Ja Kyung Lee, Sang Ho Oh, Wonyong Choi, Jong Hyeok Park and Jong Kyu Kim "Efficient Photoelectrochemical Hydrogen Production Using Helical Nanostructures as a Light Trapping Layer" (ICP 2015), Jeju, Korea, June 28 ~ July 3 (2015)

13. [Invited] Jong Kyu Kim "Multifunctional nanostructured thin-film materials fabricated by oblique-angle deposition for photonics applications" 11th International Conference on Ceramic Materials and Components for Energy and Environment Application (CMCEE) Hyatt Regency Vancouver, BC Canada June 14~19(2015)

14. [Invited] Seung Hee Lee, Hyunah Kwon, Il Yong Choi, Seung Jae Oh, Sunyong Hwang, and Jong Kyu Kim, "Nano-helical photoelectrodes for efficient energy harvesting applications" The 7th Asia-Pacific Workshop on Widegap Semiconductors (APWS 2015), Seoul, Korea, May 17~ May 20 (2015)

15. Jong Won Lee, Jun Hyuk Park, Dong Yeong Kim, and Jong Kyu Kim,  "Enhanced light extraction and electrical properties of deep-ultraviolet light-emitting diodes by utilizing transverse-magnetic-dominant emission" The 7th Asia-Pacific Workshop on Widegap Semiconductors (APWS 2015), Seoul, Korea, May 17~ May 20 (2015)  

16. Jun Hyuk Park, Guan Bo Lin, Dong Yeong Kim, Jong Won Lee, Jaehee Cho, Jungsub Kim, Jong Kyu Kim, and E. Fred Schubert, "U-shape phenomenon in the efficiency-versus-current curves in AlGaN-based deep-ultraviolet light-emitting diodes" The 7th Asia-Pacific Workshop on Widegap Semiconductors (APWS 2015), Seoul, Korea, May 17~ May 20 (2015)

17. Jong Won Lee, Jun Hyuk Park, Dong Yeong Kim, and Jong Kyu Kim, "Enhanced light extraction and electrical properties of deep-ultraviolet light-emitting diodes by utilizing transverse-magnetic-dominant emission" The 3rd International Conference on Light-Emitting Devices and Their Industrial Applications '15 (LEDIA '15), Yokohama, Japan, April 22~April 24 (2015).

18. [Keynote] Jong Kyu Kim, "Three-dimensional nanostructured materials for energy harvesting applications" Materials Challenges in Alternative & Renewable Energy (MCARE 2015), Jeju, Korea, February 24~27 (2015).    

19. Hyun Seok Song, Jaehee Cho,David S. Meyaard, Guan-Bo Lin, E. Fred Schubert, Jong Kyu Kim, "Temperature dependence of efficiency in GaInN/GaN light-emitting diodes with a strain-control layer" SPIE Photonics West 2015, San Francisco, California, USA, February 7~12 (2015).

 

2014

1. Seung Hee Lee, Dhruv Pratap Singh, Jaehee Cho and Jong Kyu Kim, "Broadband and high seletivity circular polarization discriminators based on metal-nanoparticle-decorated chiral metal oxides heterostructure" 2014 MRS Fall Meeting, Boston, USA, November 30~December 5 (2014)

2. [Invited] Dong Yeong Kim, Jong Won Lee, Sunyong Hwang, Junhyuk Park, and Jong Kyu Kim, "Enhanced Optical and Electrical Properties of AlGaN-based Deep-Ultraviolet Light-Emitting Diodes by Selective-Area-Grown GaN microstructures" International Conference on Electronic Materials and Nanotechnology for Green Environment, Jeju, Korea, November 16~19 (2014)

3. [Invited] Jong Kyu Kim, Ilyong Choi, Hyunah Kwon, Seung Hee Lee, Seung Jae Oh, "Transparent Electrodes Based on Three-Dimensional Nanohelixes Light Harvesting Applications" ECS 226th meeting, Cancun, Mexico, October 5~9 (2014)

4. Seung Jae Oh, Gyoengmin Go, Jong-Lam Lee, E. Fred Schubert, Jaehee Cho and Jong Kyu Kim, "Enhanced phosphor conversion efficiency of GaN-based white light-emitting diodes having dichroic-filtering contacts" IWN 2014 International Workshop on Nitride Semiconductors, Wroclaw, Poland, August 24~29 (2014)

5. Dong Yeong Kim, Jong Won Lee, Junhyuk Park, Sunyong Hwang, Seung Jae Oh, and Jong Kyu Kim, "Enhanced Light Extraction Efficiency of Deep-Ultraviolet Light-Emitting Diodes by Utilizing TM-dominant Light Emission" 2014 International Workshop on Nitride Semiconductors, Wroclaw, Poland, August 24~29 (2014)

6. Il Yong Choi, Xinjian Shi, Kan Zhang, Jeong Kwon, Dong Yeong Kim, Ja Kyung Lee, Sang Ho Oh, Jong Hyeok Park, Jong Kyu Kim, "Three-Dimensional WO3-Nanohelixes-based Hybridized Photoanodes for Efficient Solar Water Splitting" 2014 20th International Conference on Photochemical Conversion and Storage of Solar Energy, Berlin, Germany, Jul. 27 ~ Aug. 01 (2014)

7. Dong Yeong Kim, Jong Won Lee, Seungjae Oh, Sunyong Hwang, Junhyuk Park, and Jong Kyu Kim, "Enhanced Light Extraction Efficiency of Deep-Ultraviolet Light-Emitting Diodes by Al-coated Selective-Area-Grown GaN stripes" 2014 CLEO, San Jose, USA, June 8-13 (2014)

8. Dong Yoeng Kim, Junhyuk Park, Sunyong Hwang, Han Youl Ryu, and Jong Kyu Kim, "Evolving Light-Emitting Diodes by Genetic Algorithm-based Optimization" 5th International Conference on White LEDs and Solid State Lighting, Jeju, Korea, June 1~5 (2014)

9. [Invited] Dong-Yeong Kim, Jong Won Lee, Sunyong Hwang, Junhyuk Park, and Jong Kyu Kim, "Enhanced Light Extraction and Electrical Properties of Deep-Ultraviolet Light-Emitting Diodes by Reflective Contacts on Selective-Area-Grown GaN" 2014 SPIE Photonics West, San Francisco, CA, USA, February 1~6 (2014)

 

2013

1. Il Yong Choi, Jum Suk Jang, Wonyong Choi and Jong Kyu Kim, "WO3 Nano-Helixes Array Photoanode for Enhanced Solar-To-Hydrogen Efficiency of Photoelectrochemical Cells" 2013 MRS Fall Meeting, Boston, MA, USA, December 1~6 (2013)

2. Dong Yeong Kim, Junhyuk Park, Sunyong Hwang, Han Youl Ryu, and Jong Kyu Kim, "Evolving Light-Emitting Diodes by Genetic Algorithm-based Optimization" 2nd International Conference on Advanced Electromaterials, Jeju, Korea, November 12~15 (2013)

3. Dong Yeong Kim, Jong Won Lee, Seungjae Oh, Sunyong Hwang, Junhyuk Park, and Jong Kyu Kim, "Enhanced Light Extraction Efficiency of Deep-Ultraviolet Light-Emitting Diodes by Al-coated Selective-Area-Grown GaN stripes" 2nd International Conference on Advanced Electromaterials, Jeju, Korea, November 12~15 (2013)

4. [Invited] Jong Kyu Kim, "Nano-structured thin-film materials fabricated by oblique-angle deposition for energy harvesting applications", 224th Electrochemical Society Meeting, San Francisco, USA, Oct. 27 ~ Nov. 1, (2013)

5. Ja-kyung Lee, Kyung Song, Woo Young Jung, Jong Kyu Kim, Chan Gyung Park, and Sang Ho Oh, "Direct mapping of strain and charge reorganization in a strained InGaN/GaN with nonpolar orientation using inline electron holography" 10th International Conference on Nitride Semiconductors 2013 (ICNS-10), Washington DC, USA, August 25~30, (2013)

6. [Invited] Jong Kyu Kim, "Efficiency droop in light-emitting diodes; Challenges and Countermeasures", The WCU Korea-China Workshop on Nitride Semiconductors 2013, Hoam Convention Center, Seoul National University, Korea July 20~23, (2013)

7. Dong Yeong Kim, Jun Hyuk Park, Sunyong Hwang, Han Youl Ryu, Jong Kyu Kim, "Evolving light-emitting diodes by genetic algorithm-based optimization", International LED and Green lighting conference 2013, KINTEX, Korea, June 25~27, (2013)

8. Jun Hyuk Park, David Meyaard, Dong Yeong Kim, Sunyong Hwang, Yu Dae Han, Ju Won Choi, E. Fred Schubert and Jong Kyu Kim, "Reduction of efficiency droop and enhanced overall efficiency by graded AlGaN/GaN superlattice electron blocking layers", International LED and Green lighting conference 2013, KINTEX, Korea, June 25~27, (2013)

9. Sunyong Hwang, Jun Hyuk Park, Dong Young Kim, Jong Kyu Kim, "Probing the effect of hole-injection on the efficiency droop behavior with GaInN light-emitting triode", International LED and Green lighting conference 2013, KINTEX, Korea, June 25~27, (2013)

10. Kyung song, Christoph T. Koch, Dong Young Kim, Jong Kyu Kim, Sang Ho Oh, "2-D strain and charge density mapping using inline electron holography with a sub-nanometer resolution", International LED and Green lighting conference 2013, KINTEX, Korea, June 25~27, (2013)

11. Ja Kyung Lee, Kyung song, Woo Young Jung, Jong Kyu Kim, Chan Gyung Park, Sang Ho Oh, "Direct mapping of strain and charge reorganization in a strained InGaN/GaN with nonpolar orientation using inline electron holography", International LED and Green lighting conference 2013, KINTEX, Korea, June 25~27, (2013)

12. Woosung Kwon, Sungan Do, Jinuk Lee, Sunyong Hwang, Jong Kyu Kim, Shi-Woo Rhee, "Freestanding Luminescent Films of Nitrogen-rich Carbon Nanodots Towards Large-scale Phosphor-based White Light-emitting Devices" New Diamond and Nano Carbons Conference (NDNC 2013) Novotel Clarke Quay, Singapore, May 19 – 23 (2013)

13. [Invited] Jaehee Cho, David S. Meyaard, Jong Kyu Kim, Cheolsoo Sone, and E. Fred Schubert, "Temperature-dependent efficiency droop in GaInN light-emitting diodes" SPIE Photonics West 2013, San Francisco, California, USA, February 2~ 7 (2013)

14. Seung Hee Lee and Jong Kyu Kim, "Enhancement of power conversion efficiency of dye-sensitized solar cells by hybridization of TiO2 nano-helixes array and nanoparticles" SPIE Photonics West 2013, San Francisco, California, USA, February 2~ 7 (2013)

15. Hyunah Kwon, Seung Jae Oh, Juyoung Ham, Gwan Ho Jung, Jong-Lam Lee and Jong Kyu Kim, "Enhanced performance of organic solar cells by using three-dimensional nanohelix-array electrodes" SPIE Photonics West 2013, San Francisco, California, USA, February 2~ 7 (2013)

16. Sunyong Hwang, Junhyuk Park, Dong-yeong Kim, and Jong Kyu Kim, "Probing the efficiency droop with GaInN light-emitting triode: effect of hole-injection efficiency on droop behavior" SPIE Photonics West 2013, San Francisco, California, USA, February 2~ 7 (2013)

17. Jun Hyuk Park, Dong-yeong Kim, Sunyong Hwang, Yu Dae Han, Ju Won Choi, and Jong Kyu Kim, "Reduced efficiency droop of GaInN-based light-emitting diodes by using graded AlGaN/GaN superlattice electron blocking layers" SPIE Photonics West 2013, San Francisco, California, USA, February 2~ 7 (2013)

18. Dong-yeong Kim, Junhyuk Park, Sunyong Hwang, and Jong Kyu Kim, "Optimization of AlGaN/GaN superlattice electron blocking layers by genetic algorithm for high-efficiency GaN-based light-emitting diodes" SPIE Photonics West 2013, San Francisco, California, USA, February 2~ 7 (2013)

 

2012

1. Kyung Song, Christoph T. Koch, Jong Kyu Kim, Hyeok Jae Jeong, Hyung Seop Kim, and Sang Ho Oh, "2-D strain and charge density mapping using inline electron holography with a sub-nanometer resolution" 2012 MRS Fall Meeting, Boston, MA, USA, Nov. 25~30. (2012)

2. [Invited] Jong Kyu Kim, Sunyong Hwang, Jun Hyuk Park, Dong Yeong Kim, Jaehee Cho, E. Fred Schubert, "Efficiency droop in GaN-based light-emitting diodes: Mechanisms and solutions" PRiME 2012, Pacific Rim Meeting on Electrochemical and Solid-State Science, Honolulu, Hawaii, USA, October 7~12 (2012)

3. [Invited] Jong Kyu Kim, Seung Hee Lee, Seung Jae Oh, Hyunah Kwon, Jaehee Cho, and E. Fred Schubert, "Nano-structured thin films fabricated by oblique angle deposition for energy harvesting applications" ICEAN-2012 International Conference on Emerging Advanced Nanomaterials, The University of Queensland, Brisbane, Australia, October 22~25 (2012)

4. [Best Poster Award] Seung Hee Lee and Jong Kyu Kim, "Enhanced performance of dye-sensitized solar cells by using photoelectrode films based on TiO2 nanohelixes filled with TiO2 nanoparticles" ICEAN-2012 International Conference on Emerging Advanced Nanomaterials, The University of Queensland, Brisbane, Australia, October 22~25 (2012)

5. Sunyong Hwang, Hyunah Kown, Sang Ho Oh, and Jong Kyu Kim, "High performance gas sensors with an array of TiO2 nano-helixes" ICEAN-2012 International Conference on Emerging Advanced Nanomaterials, The University of Queensland, Brisbane, Australia, October 22~25 (2012)

6. Sunyong Hwang, Junhyuk Park, Dong-yeong Kim, Woo Jin Ha, Jong Kyu Kim, Jiuru Xu, Jaehee Cho, and E. Fred Schubert, "Promotion of hole injection enabled by GaInN/GaN light-emitting triodes and its effect on the efficiency droop" IWN 2012 International Workshop on Nitride Semiconductors, Sapporo, Japan, October 14~19, (2012)

7. Jaehee Cho, David S. Meyaard, Snag-Heon Han, Min-Ho Kim, Cheolsoo Sone, Jong Kyu Kim, and E. Fred Schubert, "Temperature dependence of the efficiency droop in GaInN light-emitting diodes", IWN 2012 International Workshop on Nitride Semiconductors, Sapporo, Japan, October 14~19, (2012)

8. Seung Jae Oh, Sameer Chhajed, Jong Kyu Kim, David Poxson, Jaehee Cho, and E. Fred Schubert, "Improved power conversion efficiency of polycrystalline Si solar cells by nanostructured broadband and omni-directional antireflection coatings" IUMRS – International Conference on Electronic Materials (IUMRS-ICEM 2012), Pacifico Yokohama, Japan, September 23~28 (2012)

9. Seung Hee Lee and Jong Kyu Kim, "High efficiency dye sensitized solar cells based on an array of sing-crystalline TiO2 nano-helixes" IUMRS – International Conference on Electronic Materials (IUMRS-ICEM 2012), Pacifico Yokohama, Japan, September 23~28 (2012)

10. [Invited] Jong Kyu Kim, Sunyong Hwang, Jun Hyuk Park, Dong Yeong Kim, Jaehee Cho, and E. Fred Schubert "Efficiency droop in GaN-based light-emitting diodes: Mechanisms and solutions" International Conference on Electronic Materials and Nanotechnology for Green Environment, Ramada Plaza Jeju Hotel, Korea, September 16~19 (2012)

11. Sunyong Hwang, Hyunah Kwon, Sameer Chhajed, Ji Won Byun, Jeon Min Baik, Jiseong Im, Sang Ho Oh, Ho Won Jang, Seok Jin Yoon, and Jong Kyu Kim, "TiO2 nanohelix gas sensors with enhanced performance and potential application as a building block of electronic noses" The 14th international meeting on chemical sensors (ICMS 2012), Nürnberg, Germany, May 20~23 (2012)

12. Kyung Song, Christoph T. Koch, Ja Kyung Lee, Jong Kyu Kim, and Sang Ho Oh, "Strain and Charge mapping of LED devices by dark-field inline electron holography" Asia-Pacific Microscopy Conference (ACMN10) & the 2012 International Conference on Nanoscience and Nanotechnology (ICONN2012),  Peth, WA Australia, 5~9 February, (2012)

 

2011

1. [Invited] Jong Kyu Kim, "Overcoming efficiency loss mechanisms in AlGaInN-based visible and deep ultraviolet light-emitting diodes", University-Industry Collaboration workshop "Current and Future Technologies of MOCVD", Advanced Institutes of Convergence Technology (AICT), Seoul National University, Korea, November 10 (2011).

2. [Outstanding Paper] Sun Yong Hwang, Sameer Chhajed, Ho Won Jang, Seok Jin Yoon, Jong Kyu Kim, "High performance gas sensors with an array of vertically aligned TiO2 nano-helixes", International Conference on Advanced Electromaterials 2011 (ICAE 2011), Ramada Plaza Jeju Hotel, Korea, November 7~10 (2011).

3. [Outstanding Paper] Hyoeun Kim, Haidang Ngo, Sameer Chhajed, and Jong Kyu Kim, "Improved phosphor conversion efficiency of white LEDs by using conductive color selective filters made of indium-tin-oxide", International Conference on Advanced Electromaterials 2011 (ICAE 2011), Ramada Plaza Jeju Hotel, Korea, November 7~10 (2011).

4. Sunyong Hwang, Hyunah Kwon, Sameer Chhajed, Ji Won Byun, Jeong Min Baik, Jiseong Im, Sangho Oh, Ho Won Jang, Seok Jin Yoon, and Jong Kyu Kim, "High performance gas sensors with an array of TiO2 nano-helixes fabricated by oblique angle deposition", International Conference on Nano Science and Nano Technology (ICNST 2011), Sunchon University, Sunchon, Korea, November 10~11 (2011).

5. Seung Jae Oh, Sameer Chhajed, Hai Dang Ngo, Duri Kim, and Jong Kyu Kim, "Nanostructured multilayer antireflection coatings with broadband and omnidirectional characteristics and their application for solar cells", International Conference on Nano Science and Nano Technology (ICNST 2011), Sunchon University, Sunchon, Korea, November 10~11 (2011).

6. Hyoeun Kim, Yong Hoon Choi, Haidang Ngo, Sameer Chhajed, and Jong Kyu Kim, "Improved phosphor conversion efficiency of white LEDs by using conductive color selective filters made of indium-tin-oxide", International Conference on Nano Science and Nano Technology (ICNST 2011), Sunchon University, Sunchon, Korea, November 10~11 (2011).

7. [Invited] Jong Kyu Kim, "Optical Thin Film Materials with Low Refractive Index and Their Applications", International Conference on Nano Science and Nano Technology (ICNST 2011), Sunchon University, Sunchon, Korea, November 10~11 (2011).

8. Kyung Song, Christoph T. Koch, Ga-Young Shin, Jong Kyu Kim, and Sang Ho Oh, "Strain analysis of InGaN/GaN multi-quantum wells by dark-field inline electron holography" FEMMS 2011 (Frontiers of Electron Microscopy in Materials Science), Sonoma DoubleTree Hotel, Rohnert Park, CA, USA, September 18~23 (2011).

9. [Invited] Jong Kyu Kim, Woojin Ha, Jaehee Cho, and E. Fred Schubert "Polarization-mismatch-reduced AlGaInN/GaInN multiple quantum well light-emitting diodes with reduced efficiency droop" 2011 KACG International Symposium on Crystal Growth, Hanyang University, Seoul, South Korea, October 13~15 (2011).

10. [Invited] Jong Kyu Kim, "Overcoming efficiency loss mechanisms in GaN-based light-emitting diodes" International LED and Green Lighting Seminar 2011, Kintex, Goyang, South Korea, June 21~23 (2011).

11. Sameer Chhajed, Jong Kyu Kim, Jaehee Cho, E. Fred Schubert, Daniel D. Koleske, and Mary Crawford, "Influence of dislocation density on temperature stability of GaInN light-emitting diodes" 9th International Conference on Nitride Semiconductors, SECC, Glasgow, Scotland, July 10~15 (2011).

12. Woo Jin Ha, Sameer Chhajed, Ashonita Chavan, Jae-Hoon Lee, Ki-Se Kim, and Jong Kyu Kim, "Carrier transport mechanism of AlGaN/GaN Schottky barrier diodes with various Al mole fractions" 9th International Conference on Nitride Semiconductors, SECC, Glasgow, Scotland, July 10~15 (2011).

13. [Invited] Jong Kyu Kim, E. Fred Schubert, and Jaehee Cho, "Promises and challenges in light-emitting diodes for lighting applications" 15th International Symposium on the Physics of Semiconductors and Applications (ISPSA-XV), Jeju, South Korea, July 5–8 (2011).

14. Sunyong Hwang, Ho Won Jang, Seok Jin Yoon, and Jong Kyu Kim, "High performance gas sensors with an array of vertically aligned TiO2 nano-helixes" 2011 MRS Spring Meeting, San Francisco, California, USA,  April 25~29 (2011).

15. Jong Kyu Kim, E. Fred Schubert, J. Cho, M. Schubert, H. J. Chung, "Polarization-mismatch-reduced AlGaInN/GaInN multiple quantum well light-emitting diodes with reduced efficiency droop" SPIE Photonics West 2011, San Francisco, California, USA, January 22~ 27 (2011).

 

2010

1. [Invited] Jong Kyu Kim, "Enhanced light extraction efficiency in GaInN light-emitting diodes by graded-refractive-index micro-pillars" International Conference on Electronic Materials and Nanotechnology for Green Environment, Jeju, Korea, November 21~24 (2010).

2. [Invited] Jong Kyu Kim, "Overcoming loss mechanisms in GaInN light-emitting diodes" Korea-Japan Workshop on Semiconductors for Energy Saving and Harvesting, Seoul National University, Seoul, Korea, October 10~12 (2010).

3. Jong Kyu Kim , Jaehee Cho, Di Zhu, An Mao, Joong Kon Son, Yongjo Park, and E. Fred Schubert, "Characteristics of reverse current in GaInN light-emitting diodes", International Workshop on Nitride Semiconductors (IWN) 2010, Tampa, Florida, USA, September 19~24 (2010).

4. [Invited] Jong Kyu Kim, "Light-extraction efficiency of Light-Emitting Diodes" International Conference on LED-IT, EXCO, Daegu, Korea, September 2~4 (2010).

5. [Invited] Jong Kyu Kim, "Overcoming the High-Current Loss Mechanism in GaInN Light-Emitting Diodes" The 4th International Conference on LED and Solid-state Lighting, COEX, Seoul, Korea, February 3~5 (2010).

 

2009

1. [Invited] Jong Kyu Kim and E. Fred Schubert, "Solid-state lighting revolution – The replacement paradigm and beyond" 15th International Workshop on the Physics of Semiconductor Devices(IWPSD), New Delhi, India, December 15 – 19 (2009).

2. [Invited] E. Fred Schubert and Jong Kyu Kim, "Challenges and Opportunities in Solid-state Lighting", 2009 MRS Fall Meeting, Boston, MA, USA, Nov. 30 ~ Dec. 4. (2009).

3. Jong Kyu Kim, Frank W. Mont, Ahmed N. Noemaun, David Meyaard, and E. Fred Schubert, "Enhanced light extraction and controllability of far-field emission pattern of GaInN light-emitting diodes by graded-refractive-index micro-pillars" The 8th International Conference on Nitride Semiconductors(ICNS-9), Jeju, South Korea, October 18 – 13 (2009).

4. David Meyyard, Jaehee Cho, Martin F. Schubert, Sameer Chhajed, Jong Kyu Kim, and E. Fred Schubert, "Nitride Based Light Emitting Diodes Embedded with a Wire-grid Polarizer" 2009 MRS Fall Meeting, Boston, MA, USA, Nov. 30 ~ Dec. 4. (2009).

5  Di. Zhu, Jiuru Xu, Ahmed Noemaun, Jong Kyu Kim, E. Fred Schubert, Mary H. Crawford, D. D. Koleske, "The Origin of the High Diode-ideality Factors in GaInN/GaN Multiple Quantum Well Light-emitting Diodes", 2009 MRS Fall Meeting, Boston, MA, USA, Nov. 30 ~ Dec. 4. (2009).

6. Seung Cheol Han, Jae-Kwan Kim, Jun Young Kim, Joon Seop Kwak, Kangho Kim, Jong Kyu Kim, E. Fred Schubert, Kyoung-Kook Kim, and Ji-Myon Lee, "Low-resistance Ohmic Contacts to N-face p-GaN for the Fabrication of Functional Devices", 2009 MRS Fall Meeting, Boston, MA, USA, Nov. 30 ~ Dec. 4. (2009).

7. [Invited] Jong Kyu Kim and E. Fred Schubert, " III-Nitride light-emitting diodes for solid-state lighting revolution" 2009 Asia  Communications and Photonics Conference and Exhibition, Shanghai, china, Nov. 2-6 (2009).

8. Jong Kyu Kim, Frank W. Mont, Ahmed N. Noemaun, David Meyaard, and E. Fred Schubert, "Enhanced light extraction and controllability of far-field emission pattern of GaInN light-emitting diodes by graded-refractive-index micro-pillars" The 8th International Conference on Nitride Semiconductors (ICNS-8), Jeju, South Korea, October 18 – 13 (2009).

9. [Invited] E. Fred Schubert and Jong Kyu Kim, "Light-emitting diode designs for high power applications –overcoming high-power loss mechanisms" The 8th International Conference on Nitride Semiconductors(ICNS-8), Jeju, South Korea, October 18 – 13 (2009).

10. Ashok K. Sood, Yash R. Puri, Martin F. Schubert, David J. Poxson, Jong Kyu Kim, E. Fred Schubert, Dennis L. Pollar, Martin B. Soprano,  "Design and development of nanostructure based antireflection coatings for EO/IR sensor applications" SPIE Optics & Photonics, San  Diego, CA, August 2-6 (2009).

11. Roya Mirhosseni, Martin F. Schubert, Sameer Chhajed, Jaehee Cho, Jong Kyu Kim, and E. Fred Schubert, "Dual-blue emitting active  regions illustrate enhancements in color rendering ability and luminous efficacy in phosphor-converted white light-emitting diodes" SPIE Optics & Photonics, San Diego, CA, August 2-6 (2009).

12. [Invited] Jong Kyu Kim and E. Fred Schubert, " Novel low-refractive-index materials and their applications" SPIE Optics & Photonics, San  Diego, CA, August 2-6 (2009).

13. [Invited] Jong Kyu Kim and E. Fred Schubert, "Solid-state lighting revolution and beyond" Energy efficiency and green house gas  management symposium in US-Korea Conference 2009, Raleigh, NC, July 16-19 (2009).

14. [Invited] Jong Kyu Kim, "Solid-state lighting revolution and beyond" Energy Workshop I  in US-Korea Conference 2009, Raleigh, NC, July 16-19 (2009).

15. [Invited] Jong Kyu Kim, "Solid-state lighting – Emerging market opportunity" Entrepreneurship Forum in US-Korea Conference 2009,  Raleigh, NC July 16-19 (2009).

16. [Invited] Jong Kyu Kim, "Light-emitting diodes – Replacement paradigm and beyond" Industry Forum in US-Korea Conference 2009,  Raleigh, NC, July 16-19 (2009).

17. [Invited] E. Fred Schubert and Jong Kyu Kim, "Energy implications of solid-state lighting technology" Optics and Photonics for Advanced Energy Technology Topical Meeting, MIT, Cambridge, MA, USA, June 24 – 25 (2009).

18. Wonseok Lee, Min Ho Kim, Di Zhu, Ahmed Noemaun, E. Fred Schubert, and Jong Kyu Kim, "Growth and characterization of GaInN blue light-emitting diodes with GaInN quantum barriers" 2009 Electronics Materials conference, University Park, Pennsylvania, USA, June 24 – 26 (2009).

19. [Invited] E. Fred Schubert and Jong Kyu Kim, "Low-refractive-index materials – A new class of optical thin-film materials" The Conference on Lasers and Electro-Optics (CLEO) 2009, Baltimore, Maryland, USA, May 31 – June 5 (2009).

20. Qi Dai, Martin F. Schubert, Min Ho Kim, Jong Kyu Kim, E. Fred Schubert, Daniel D. Koleske, Mary H. Crawford, Stephen r. Lee, Arthur J. Fischer, Gerald Thaler, Michael A. Banas, "Internal quantum efficiency and non-radiative recombination coefficient of GaInN/GaN multiple quantum wells with different dislocation densities" The Conference on Lasers and Electro-Optics (CLEO) 2009, Baltimore, Maryland, USA, May 31 – June 5 (2009).

21. [Invited] Martin F. Schubert, Jiuru Xu, Qi Dai, Frank W. Mont, Min Ho Kim, Jong Kyu Kim, E. Fred Schubert, Hunjae Chung, Sukho Yoon, Cheolsoo Sone, and Yongjo Park, "Study of efficiency droop in GaInN/GaN and polarization-matched GaInN/AlGaInN and GaInN/GaInN light-emitting diodes" 215th ECS Meeting, San Francisco, CA, USA, May 24– 29 (2009).

22. [Invited] E. Fred Schubert and Jong Kyu Kim, "Light-emitting diodes – The replacement paradigm and beyond" OIDA's 2009 OPTOmism conference, Santa Clara, CA, USA, May 18 – 20 (2009).

23. Jong Kyu Kim, Ahmed N. Noemaun, Frank W. Mont, David Meyaard, David J. Poxson, Cheolsoo Sone, Yongjo Park, and E. Fred  Schubert, "Elimination of total internal reflection in GaInN light-emitting diodes by graded-refractive-index micro-pillars" 2009 Materials  Research Society (MRS) Spring meeting, San Francisco, CA, April 13-17 (2009).

24. Jiuru Xu, Martin F. Schubert, Ahmed N. Noemaun, Di Zhu, Min Ho Kim, Jong Kyu Kim, and E. Fred Schubert, "Matching material   polarization in GaInN light-emitting diodes – A novel concept for enhancing performance and reducing efficiency droop" 2009 Materials   Research Society (MRS) Spring meeting, San Francisco, CA, April 13-17 (2009).

25. [Plenary Presentation] Jong Kyu Kim and E. Fred Schubert, "Solid-state lighting revolution and beyond" The 16th Korean Conference on Semiconductors, Daejeon, South Korea, February 18~20, (2009).

26. [Invited] E. Fred Schubert, Jong Kyu Kim, Min Ho Kim, Martin F. Schubert, "Polarization-matching in GaInN light-emitting diodes: a new concept for reducing efficiency droop and enhancing performance" SPIE Photonics West, San Jose, CA, January 24-29 (2009).

 

2008

1. [Plenary Presentation] Jong Kyu Kim and E. Fred Schubert, "Efforts towards more efficient inorganic light-emitting diodes" LED Event 2008, Evoluon Eindhoven, the Netherland , February 12~14, (2008).

2. [Plenary Presentation] Jong Kyu Kim and E. Fred Schubert, "Light-emitting diodes-looking back 100years and looking forward to the next 10 years" LED Event 2008, Evoluon Eindhoven, the Netherlands, February 12~14, (2008).

3. [Invited] Jong Kyu Kim, Min-Ho Kim, Martin F. Schubert, Qi Dai, Tan Sakong, Sukho Yoon, Cheolsoo Sone, Yongjo Park, Joachim Piprek, and E. F. Schubert, "The origin of efficiency droop in GaN-based light-emitting diodes and its solution" Conference on Lasers and Electro-Optics (CLEO) 08, San Jose, CA, May 4~9 (2008).

4. [Invited] E. Fred Schubert and Jong Kyu Kim, "Innovation in optical materials for the advancement of solid-state lighting technologies" U.S.-Korea Nano-Optoelectronics Workshop, KAIST, Daejeon, Korea, January 7 ~ 8 (2008).

5. [Invited] E. Fred Schubert and Jong Kyu Kim, "Low-refractive-index materials – A new class of materials for photonics applications" SPIE Photonics West 2008, San Jose, CA, January 19 ~ 24 (2008).

6. Q. Dai, Martin F. Schubert, Jong Kyu Kim, E. Fred Schubert, Daniel D. Koleske, Mary H. Crawford, Steve R. Lee, Arthur J. Fischer, Gerald Thaler, and Michael A. Banas, "Recombination mechanisms of GaInN light-emitting diode wafers with various dislocation densities" Connecticut Microelectronics & Optoelectronics Consortium, 17th annual symposium, New Haven, CT, April 9 (2008).

7. [Best Student Paper] David J. Poxson, Frank W. Mont, Jong Kyu Kim, and E. Fred Schubert, "Multilayer nano-structured anti-reflection coatings with broad-band omnidirectional characteristics" Connecticut Microelectronics & Optoelectronics Consortium, 17th annual symposium, New Haven, CT, April 9 (2008).

8. Martin F. Schubert, Sameer Chhajed, Jong Kyu Kim, E. Fred Schubert, Min-Ho Kim, Daniel D. Koleske, Mary H. Crawford, Steve R. Lee, Arthur J. Fischer, Gerald Thaler, and Michael A. Banas, J. Piprek, "Efficiency droop in GaInN/GaN LEDs: the effect of dislocation density, physical origin, and possible solution" International Symposium on Semiconductor Light Emitting Devices (ISSLED) 2008, Phoenix, Arizona, April 27~May 2 (2008).

9.  Frank W. Mont, David J. Poxson, Martin F. Schubert, Sameer Chhajed, Ahmed Noemaun, Jong Kyu Kim, E. Fred Schubert, Arthur J. Fischer, and Mary H. Crawford, "Micro-patterned graded-index coatings of co-sputtered TiO2-SiO2 for enhanced light extraction from GaInN light-emitting diodes" International Symposium on Semiconductor Light Emitting Devices (ISSLED) 2008, Phoenix, Arizona, April 27~May 2 (2008).

10.  David J. Poxson, Frank W. Mont, Martin F. Schubert, Jong Kyu Kim, and E. Fred Schubert, "Quantification of porosity and deposition rate  of nano-porous films grown by oblique angle deposition" AVS 55th International Symposium & Exhibition, Boston, MA, October 19~24  (2008).

11. M. F. Schubert, S. Chhajed, Jong Kyu Kim, J. Cho, and E. F. Schubert, "Polarized c-plane GaInN/GaN light-emitting diodes" International  Workshop on Nitride Semiconductors 2008, Montreux, Switzerland, October 6~10 (2008).

12. Jong Kyu Kim, M. H. Kim, M. F. Schubert, Q. Dai, J. Piprek, S.-M. Lee, S. Yoon, C. Sone, Y. Park, D. D. Koleske, M. H. Crawford, S.  R. Lee, E. Fred Schubert, "Efficiency droop in GaN-based light-emitting diodes" International Workshop on Nitride Semiconductors  2008, Montreux, Switzerland, October 6~10 (2008).

13. Jiuru Xu, Martin F. Schubert, Jong Kyu Kim and E. Fred Schubert, "The effect of hole-injection efficiency on efficiency droop of GaN-based   light emitters investigated by light-emitting triodes" 2008 Lester Eastman Biennial Conference on High Performance Devices, University   of Delaware, August 5~7(2008).

14. Ahmed N. Noemaun, Frank W. Mont, David J. Poxson, Di Zhu, Jong Kyu Kim, and E. Fred Schubert, "Design of graded refractive index micro-patterns to enhance light-extraction efficiency in GaInN blue light-emitting diodes" 2008 Lester Eastman Biennial Conference on   High Performance Devices, University of Delaware, August 5~7 (2008).

15. Roya Mirhosseni, Ahmed N. Noemaun, C. Sone, Y. Park, Jong Kyu Kim, and E. Fred Schubert, "GaInN vertical-structure light-emitting  diodes on bulk GaN substrate with optical enhancement technique: omnidirectional reflectors and surface texture treatment" 2008 Lester  Eastman Biennial Conference on High Performance Devices, University of Delaware, August 5~7 (2008).

16. [Invited] E. Fred Schubert, Jong Kyu Kim, and YoonSooPark, "Relevance of Light-Emitting Diodes and Photonics for Energy", US-Korea   Conference on Science, Technology, and Entrepreneurship, San Diego, August 14~17 (2008).

 

2007

1. F. W. Mont, Hong Luo, Jong Kyu Kim, and E. F. Schubert "High-refractive index nano-particle-loaded encapsulants for light-emitting diodes" SPIE Photonics West, Proc. SPIE 6486, 64861C, San Jose, CA, January 20-25 (2007).

2. J. -Q. Xi, Hong Luo, Jong Kyu Kim, and E. F. Schubert "High light-extraction efficiency in GaInN light-emitting diode with pyramid reflector" SPIE Photonics West, Proc. SPIE 6486, 648606, San Jose, CA, January 20-25 (2007).

3. F. W. Mont, Jong Kyu Kim, Martin F. Schubert, Hong Luo, E. F. Schubert and Richard W. Siegel "High refractive index nanoparticle-loaded encapsulants for light-emitting diodes" Connecticut Microelectronics & Optoelectronics Consortium, 16th annual symposium, New Haven, CT, March 21 (2007).

4. Jong Kyu Kim, Martin F. Schubert, J. -Q. Xi, Frank Mont, and E. Fred Schubert, "Enhanced light extraction in GaInN light-emitting diodes with graded-index indium tin oxide layer" Conference on Lasers and Electro-Optics (CLEO), Baltimore, MD, May 6-11 (2007).

5. Arthur J. Fischer, Frank Mont, Jong Kyu Kim, E. Fred Schubert, Daniel D. Koleske, and mary H. Crawford, "Enhanced light-extraction from InGaN quantum wells using refractive-index-matched TiO2" Conference on Lasers and Electro-Optics (CLEO), Baltimore, MD, May 6-11 (2007).

6.  K. X. Chen, Y. A. Xi, F. W. Mont, Jong Kyu Kim, E. F. Schubert, W. Liu, X. Li, and J. A. Smart, "Recombination dynamics in ultraviolet light-emitting diodes with Si-doped AlxGa1-xN/AlyGa1-yN multiple quantum well active regions" The 49th Electronic Materials Conference, University of Norte Dame, Indiana, June 20~22 (2007).

7. [Plenary Presentation] E. Fred Schubert and Jong Kyu Kim, "Light-emitting diodes-looking back 100years and looking forward to the next 10 years" 4th China International Forum & Exhibition on Solid State Lighting, Shanghai, China, August 22~24, (2007).

8. [Invited] Jong Kyu Kim, and E. F. Schubert, "Optical thin film materials with low refractive index and their applications" International Nonimaging Optics Workshop 2007, San Diego, CA, August 24~25 (2007).

9. M. F. Schubert, Jong Kyu Kim, S. Chhajed, E. F. Schubert, "Conductive distributed Bragg reflector fabricated by oblique angle deposition from a single material" SPIE Optics & Photonics, San Diego, CA, August 26~30 (2007)

10. K. X. Chen, W. Lee, Q. Dai, Jong Kyu Kim, E. F. Schubert, W. Liu, S. Wu, X. Li, and J. A. Smart, "Parasitic sub-band-gap emission  originating from compensating native defects in Si doped AlGaN" The 7th International Conference on Nitride Semiconductors (ICNS-7),  Las Vegas, Nevada, September 16~21 (2007).

11. Min-Ho Kim, Martin F. Schubert, Qi Dai, Jong Kyu Kim, E. Fred Schubert, Joachim Piprek, and Yongjo Park, "Origin of efficiency droop in  GaN-based light-emitting diodes" The 7th International Conference on Nitride Semiconductors (ICNS-7), Las Vegas, Nevada,  September 16~21 (2007).

12. Jong Kyu Kim, Sameer Chhajed, Martin F. Schubert, E. Fred Schubert, Arthur J. Fischer, Mary H. Crawford, Jaehee Cho, Hyunsoo Kim,  and Cheolsoo Sone, "Light extraction enhancement of GaInN light-emitting diodes by graded-refractive-index ITO anti-reflection contact",  The 7th International Conference on Nitride Semiconductors (ICNS-7), Las Vegas, Nevada, September 16~21 (2007).

13. [Invited] Jong Kyu Kim, Sameer Chhajed, Martin F. Schubert, and E. F. Schubert, "Novel low refractive index materials and their   applications" 10th International Conference on Advanced Materials, Indian Institute of Science, Bangalore, India, October 8~13 (2007).

14. K. X. Chen, W. Lee, Q. Dai, Jong Kyu Kim, E. F. Schubert, W. Liu, S. Wu, X. Li, and J. A. Smart, "Parasitic sub-band-gap emission  originating from compensating native defects in Si doped AlGaN" The 31st EDS/CAS Activities in Western New York Conference,  Rochester Institute of Technology, New York, November 7 (2007).

15. Min-Ho Kim, Martin F. Schubert, Qi Dai, Jong Kyu Kim, E. Fred Schubert, Joachim Piprek, and Yongjo Park, "Origin of efficiency droop in  GaN-based light-emitting diodes" The 31st EDS/CAS Activities in Western New York Conference, Rochester Institute of Technology,  New York, November 7 (2007).

16. Martin F. Schubert, Sameer Chhajed, Jong Kyu Kim, E. Fred Schubert, Jaehee Cho, "Polarization anisotropy in the light emission of blue  GaInN/GaN light-emitting diodes grown on (0001) oriented sapphire substrate" Materials Research Society (MRS) Fall Meeting, Boston  MA, November 26~30(2007).

17. Min-Ho Kim, Martin F. Schubert, Jong Kyu Kim, E. Fred Schubert, Hee Seok Park, Yongjo Park, and Joachim Piprek, "Investigation on   Origin of efficiency droop in GaN-based high-power light-emitting diodes" Materials Research Society (MRS) Fall Meeting, Boston MA,   November 26~30 (2007).

18. Frank W. Mont, David J. Poxson, Jong Kyu Kim, E. Fred Schubert, Arthur J. Fischer, and Mary H. Crawford, "Enhancement of light   extraction efficiency in GaInN blue light-emitting diodes by graded-refractive-index antireflection coating of co-sputtered titanium dioxide and   silicon dioxide" Materials Research Society (MRS) Fall Meeting, Boston MA, November 26~30 (2007).

19. Wonseok Lee, Kaixuan Chen, Qi Dai, Sameer Chhajed, Martin F. Schubert, Frank W. Mont, Jong Kyu Kim, Christian Wetzel, and E. Fred   Schubert, "Effect of structural properties of AlN templates on the optical, electrical, and structural properties of n-type AlGaN" Materials   Research Society (MRS) Fall Meeting, Boston MA, November 26~30 (2007).

 

2006

1. [Invited]  Jong Kyu Kim, J.-Q. Xi, and E. F. Schubert, "Omni-direction reflectors for light-emitting diodes" SPIE Photonics West, San Jose, CA, Jan 21-26 (2006).

2. Jong Kyu Kim, J.-Q. Xi, Hong Luo, J. Cho, C. Sone, Y. Park, J. M. Zavada, H. X. Jiang, T. Gessmann, and E. F. Schubert, "GaN light-emitting triodes for high-efficiency hole injection and light emission" SPIE Photonics West, San Jose, CA, Jan 21-26 (2006).

3. [Invited] Jong Kyu Kim, and E. F. Schubert, "Improvements in light-extraction efficiency of light-emitting diodes" 2006 Materials Research Society (MRS) Spring meeting, San Francisco, CA, April 17-21(2006).

4. Y. Xi, T. Gessmann, K. Chen, X. Li, Jong Kyu Kim, E. F. Schubert, W. Liu, J. A. Smart, and L. J. Schowalter, "AlGaN UV LEDs emitting at 340 nm grown on AlN bulk substrates" 2006 Materials Research Society (MRS) Spring meeting, San Francisco, CA, April 17-21 (2006).

5. H. Luo, Jong Kyu Kim, E. F. Schubert, J. cho, C. Sone, and Y. Park, "Design of high efficiency packages for white light-emitting diode lamps" 2006 Materials Research Society (MRS) Spring meeting, San Francisco, CA, April 17-21 (2006).

6. Jong Kyu Kim, J. –Q. Xi, Hong Luo, E. Fred Schubert, Jaehee Cho, Cheolsoo Sone, and Yongjo Park, "Enhancement of light-extraction in GaN light-emitting diodes by conductive omni-directional reflectors" Conference on Lasers and Electro-Optics (CLEO), Long Beach, CA, May 22-26 (2006).

7. Y. A. Xi, T. Gessmann, K. Chen, X. Li, Jong Kyu Kim, E. F. Schubert, W. Liu, J. A. Smart, and L. J. Schowalter, "AlGaN UV LEDs emitting at 340 nm grown on AlN bulk substrates" IEEE Lester Eastman Conference on High Performance Devices, Ithaca NY, August 2-4 (2006).

8. K. Chen, Y. A. Xi, F. Mont, Jong Kyu Kim, E. F. Schubert, W. Wetzel, W. Liu, X. Li, J. A. Smart, and L. J. Schowalter, "Very high quality AlN grown on (0001) sapphire by using metal-organic vapor-phase epitaxy" IEEE Lester Eastman Conference on High Performance Devices, Ithaca NY, August 2-4(2006).

9. Hong Luo, Jong Kyu Kim, E. F. Schubert, Jaehee Cho, Cheolsoo Sone, and Yongjo Park, "Highly efficient package configurations for white-light-emitting diode lamps" IEEE Lester Eastman Conference on High Performance Devices, Ithaca NY, August 2-4 (2006).

10. [Plenary Presentation] E. Fred Schubert and Jong Kyu Kim, "Solid-state lighting – Opportunities for fundamental innovation" International   Symposium on Compound Semiconductors (ISCS), Vancouver, Canada, August 14-17 (2006).

11. [Plenary Presentation] E. Fred Schubert and Jong Kyu Kim, "Solid-state lighting – Opportunities for fundamental innovation" Asia Pacific   Optical Communications Conference (APOC), Gwangju, Korea, September 3-7 (2006).

12. [Plenary Presentation] E. Fred Schubert and Jong Kyu Kim, "Solid-state lighting – Opportunities for fundamental innovation" 13th   International Workshop on Inorganic and Organic Electroluminescence and 2006 International Conference on the Science and   Technology of Emissive Display and Lighting (EL 2006), Jeju Island, Korea, September 18-22 (2006).

13. Jong Kyu Kim, J. -Q. Xi, Hong Luo, E. F. Schubert, Jaehee Cho, Cheolsoo Sone, and Yongjo Park, "Improvements in light-extraction  efficiency of light-emitting diodes with omni-directional reflectors" 13th International Workshop on Inorganic and Organic  Electroluminescence and 2006 International Conference on the Science and Technology of Emissive Display and Lighting (EL  2006), Jeju Island, Korea, September 18-22 (2006).

14. J. Das, Jong Kyu Kim, Y. A. Xi, E. F. Schubert, P. M. Mensz "Recombination dynamics at dislocations in GaInN-based light-emitting diodes   " Materials Research Society (MRS) Fall Meeting, Boston MA, November 27-December 1 (2006).

15. Roya Mirhosseini, Jong Kyu Kim, Hong Luo, J. Cho, C. Sone, Y. Park, and E. F. Schubert "Omni-directional reflectors for GaInN   vertica-structure light-emitting diodes" Materials Research Society (MRS) Fall Meeting, Boston MA, November 27-December 1 (2006).

16. Y. A. Xi, K. X. Chen, F. Mont, Jong Kyu Kim, E. F. Schubert, W. Liu, and J. A. Smart, "Extremely high quality AlN grown on (0001)   sapphire by metal-organic vapor-phase epitaxy" Materials Research Society (MRS) Fall Meeting, Boston MA, November 27-December   1 (2006).

17. J. -Q. Xi, Jong Kyu Kim, and E. F. Schubert "Low-refractive index materials: A new class of material for optoelectronic and photonic applications" Materials Research Society (MRS) Fall Meeting, Boston MA, November 27-December 1 (2006).

18. J. -Q. Xi, Hong Luo, Jong Kyu Kim, and E. F. Schubert "High light-extraction efficiency in GaInN light-emitting diode with pyramid reflector"   Materials Research Society (MRS) Fall Meeting, Boston MA, November 27-December 1 (2006).

 

2005

1. Y. Xi, S. Chhajed, J. –Q. Xi, J. M. Shah, Jong Kyu Kim, E. Fred Schubert, "Junction and carrier temperature measurements in light-emitting diodes using three different methods" SPIE Photonics West, San Jose, CA, Jan. 22-27 (2005).

2. E. Fred Schubert, Jong Kyu Kim, H. Luo, Y. Xi, J. M. Shah, T. Gessmann, "Enhancement of light extraction in GaInN light-emitting diodes by diffuse omni-directional reflectors" Second Asia-Pacific Workshop on Wide Bandgap Semiconductors (APWS-2005), Hsinchu, Lakeshore Hotel, Hsinchu, Taiwan, March 7-9 (2005).

3. [Best Oral Presentation Award] H. Luo, Jong Kyu Kim, Y. Xi, J. M. Shah, T. Gessmann, and E. Fred Schubert, "Improvement of extraction efficiency of GaInN light-emitting diodes by employing diffuse omni-directional reflectors" Connecticut Symposium on Microelectronics and Optoelectronics, Univ. of Connecticut, New Haven, CT, March 17 (2005).

4. Y. Xi, J.-Q. Xi, T. Gessmann, J. M. Shah, Jong Kyu Kim, E. Fred Schubert, A. J. Fischer, M. H. Crawford, K. H. A. Bogart, A. A. Allerman, "Junction temperature and thermal resistance measurement in deep-UV light-emitting diodes" Connecticut Symposium on Microelectronics and Optoelectronics, Univ. of Connecticut, New Haven, CT, March 17 (2005).

5. Jong Kyu Kim, J. –Q. Xi, H. Luo, E. Fred Schubert, J. Cho, C. Sone, Y. Park, "Enhancement of light extraction in GaN ultraviolet light-emitting diodes by omni-directional reflectors with ITO nanorod low-refractive layer" Proceedings of SPIE Fifth International Conference on Solid State Lighting, 5941, p. 59410K, San Diego, CA, August 1-4 (2005).

6. Thomas Gessmann, Yangang Xi, Hong Luo, Jong Kyu Kim, Jinqun Xi, Kaixuan Chen, Jay M. Shah, and E. Fred Schubert, "Polarization-enhanced ohmic contacts to GaInN-based blue light-emitting diodes" AVS 52nd International Symposium & Exhibition, Boston, MA, Oct. 30-Nov. 4 (2005).

7. Hong Luo, Jong Kyu Kim, Yangang Xi, E. Fred Schubert, Jaehee Cho, Cheolsoo Sone and Yongjo Park, "Trapped whispering-gallery optical modes in white light-emitting diodes lamps with remote phosphor" AVS 52nd International Symposium & Exhibition, Boston, MA, Oct. 30-Nov. 4 (2005).

8. Yangang Xi, Xiaolu Li, Jong Kyu Kim, Frank W. Mont, Thomas Gessmann, Hong Luo, Alyssa Pasquale, and E. F. Schubert, "Quantitative assessment of diffusivity and specularity of textured surfaces for light extraction in light-emitting diodes" AVS 52nd International Symposium & Exhibition, Boston, MA, Oct. 30-Nov. 4 (2005).

9. Hong Luo, Jong Kyu Kim, Yangang Xi, E. Fred Schubert, Jaehee Cho, Cheolsoo Sone and Yongjo Park, "Analysis of high-power packages for white-light-emitting diode lamps with remote phosphor" 2005 Materials Research Society (MRS) Fall meeting, Nov. 28 ~ Dec. 2, Boston, MA (2005)

10. Thomas Gessmann, Yangang Xi, Hong Luo, Jong Kyu Kim, Jinqun Xi, Kaixuan Chen, and E. Fred Schubert, "Polarization-enhanced ohmic  contacts to GaInN-based blue light-emitting diodes" 2005 Materials Research Society (MRS) Fall meeting, Boston, MA, Nov. 28-Dec. 2,  (2005).

11. Jay M. Shah, Jong Kyu Kim, Y. Xi, Th. Gessmann and E. F. Schubert, "Reduction of Base Access Resistance in AlGaN/GaN   Heterojunction Bipolar Transistors using GaInN Base Cap Layer and Selective Epitaxial Growth" 2005 Materials Research Society (MRS)   Fall meeting, Boston, MA, Nov. 28-Dec. 2, (2005).

12. Jingqun Xi, Jong Kyu Kim, Dexian Ye, Jasbir S. Juneja, T.-M. Lu, Shawn-Yu Lin and E. F. Schubert, "Optical Thin Films with Very Low   Refractive Index Consisting of Array of SiO2 Nano-rods for Photonics Applications" 2005 Materials Research Society (MRS) Fall   meeting, Boston, MA, Nov. 28-Dec. 2 (2005).

13. [Best Student Paper Award] Jingqun Xi, Jong Kyu Kim, Dexian Ye, Jasbir S. Juneja, T.-M. Lu, Shawn-Yu Lin and E. F. Schubert, "  Optical Thin Films with Very Low Refractive Index and their application in photonic devices" 2005 International Semiconductor Device  Research Symposium, Dec. 7-9, Bethesda, Maryland (2005).

14. Hong Luo, Jong Kyu Kim, Yangang Xi, E. Fred Schubert, Jaehee Cho, Cheolsoo Sone and Yongjo Park, "High-power packages for  phosphor-based white-light-emitting diode lamps" 2005 International Semiconductor Device Research Symposium, Dec. 7-9, Bethesda,  Maryland (2005).

 

2004

1. Jong Kyu Kim, E. L. Waldron, Y. –L. Lee, T. Gessmann, H. W. Jang, J. –L. Lee, and E. F. Schubert,  "P-type conductivity in bulk AlxGa1–xN and AlxGa1–xN/AlyGa1–yN superlattices with average Al mole fraction 20%for LED confinement layers" The 5th International Symposium on Blue Laser and Light Emitting Diodes (ISBLLED-2004), Gyeongju, Korea, March 15-19 (2004).

2. C. C. Kim, Jong Kyu Kim, J. -L. Lee, M. S. Yi, D. Y. Noh, Y. Hwu, P. Ruterana, and J. H. Je, "Metal/GaN Interfacial Nanostructures and their Electrical Properties" The 5th International Symposium on Blue Laser and Light Emitting Diodes (ISBLLED-2004), Gyeongju, Korea, March 15-19 (2004).

3. J. -L. Lee, H. W. Jang, Jong Kyu Kim, and S. Y. Kim, "Ohmic Contacts for High-Power LEDs" The 5th International Symposium on Blue Laser and Light Emitting Diodes (ISBLLED-2004), Gyeongju, Korea, March 15-19 (2004).

4. Jong Kyu Kim, T. Gessmann, H. Luo, and E. Fred Schubert, "GaInN Light-Emitting Diodes with Omni-directional Reflectors" Connecticut Symposium on Microelectronics and Optoelectronics, Univ. of Connecticut, New Haven, CT, April 7, (2004).

5. Y. -L. Li, Jay M. Shay, R. Jackson, Y. Xi, S. Chhajed, Jong Kyu Kim, T. Gessmann, and E. Fred Schubert, "Illumination sources based on multiple light-emitting diodes" Conference on Lasers and Electrooptics (CLES), San Francisco, CA, May 16-20 (2004).

6. Jong Kyu Kim, T. Gessmann, H. Luo, and E. Fred Schubert, "GaInN Light-Emitting Diodes with Omni-directional Reflectors" 2004 IEEE Lester Eastman Conference on High Performance Devices, Rensselaer Polytechnic Institute, USA, August 4-6 (2004).

7. Jong Kyu Kim, H. Luo, Y. Xi, T. Gessmann, and E. Fred Schubert, "Enhancement of light extraction efficiency of GaInN light-emitting diodes by omni-directional diffuse reflectors", 2004 Materials Research Society (MRS) Fall meeting, Boston, USA, Nov. 29-Dec. 3, (2004).

8. Y. Xi, J.-Q. Xi, T. Gessmann, J. M. Shah, Jong Kyu Kim, E. Fred Schubert, A. J. Fischer, M. H. Crawford, K. H. A. Bogart, A. A. Allerman, "Junction temperature measurement in deep UV light-emitting diodes" 2004 Materials Research Society (MRS) Fall meeting, Boston, USA, Nov. 29-Dec. 3, (2004).

 

2003

1. Jong Kyu Kim, T. Gessmann, Y. –L. Li, and E. F. Schubert, "GaInN Light-Emitting Diodes with Omni-Directional Reflectors Using Rare-Earth Metal Oxides" 2003 Materials Research Society (MRS) Fall meeting, Boston, USA, Dec. 1-5 (2003).

 

2002

1. Jong Kyu Kim, Ho Won Jang, Jeremy Schroeder, Eric Carleton, Timothy Sands, Myung Cheol Yoo and Jong-Lam Lee, "Electrical properties of metal contacts on KrF excimer laser irradiated GaN" 44th 2002 Electronic Materials Conference, Univ. of Santa Babara, CA, USA (2002).

2. S. Y. Kim, H. W. Jang, Jong Kyu Kim, C. M. Jeon, and J.–L. Lee, "Transparent ohmic contacts on p-GaN using indium tin oxide overlayer" International Workshop on Nitride Semiconductors (IWN 2002), Aachen, Germany, Books of Abstracts p235. (2002).

3. J. M. Baik, Jong Kyu Kim, K. J. Choi, H. W. Jang, S. H. Oh, Ch. G. Park, Y. Shon, T. W. Kang, and J. –L. Lee, "Microstructural and electrical investigation of the p-type GAN implanted with Mn+ ions" International Workshop on Nitride Semiconductors (IWN 2002), Aachen, Germany, Books of Abstracts p. 331. (2002).

4. Jong Kyu Kim, Ho Won Jang, and Jong-Lam Lee, "GaN-based metal-semiconductor-metal ultraviolet photodetectors with Ir and Ru Schottky contacts" International Workshop on Nitride Semiconductors(IWN 2002), Aachen, Germany, Books of Abstracts p. 57. (2002).

 

2001

1. K. A. Rickert, Jong Kyu Kim, F. J. Himpsel, A. B. Ellis, J. –L. Lee and T. F. Kuech, "Fermi level pinning and band bending determination via X-ray photoemission spectroscopy" Abstracts of papers of the American Chemical Society. 222: 598-INOR Part 1, Aug (2001).

2. Ki Hong Kim, Sukho Yoon, Jong Kyu Kim, Ho Won Jang, Kwang Ho Lee, Yang Mo Koo, Euijoon Yoon, and Jong-Lam Lee, "Study on InAs/InP quantum dots by Synchrotron Radiation X-ray Diffraction and Photoemission Spectroscopy" 2001 Materials Research Society (MRS) Spring meeting, Abstracts p.150, San Francisco, USA (2001).

3. Sang Youn Han, Ki Hong Kim, Jong Kyu Kim, Ho Won Jang, Kwang Ho Lee, and Jong-Lam Lee, "Ohmic contact formation mechanism of Ni-based contact on n-type 4H-SiC" 2001 Materials Research Society (MRS) Spring meeting, Abstracts p.110, San Francisco, USA (2001).

4. Ho Won Jang, Chang Min Jeon, Jong Kyu Kim and Jong-Lam Lee, "Improved low resistance ohmic contact of Pd/Ni on p-type GaN" 2001 Materials Research Society (MRS) Spring meeting, Abstracts p. 109, San Francisco, USA (2001).

5. Jong Kyu Kim, Yu-Hwa Cho, Jong-Lam Lee, Yong Jo Park, and Taeil Kim, "Effects of Au overlayer on the thermal stability of Pt-based ohmic contacts on p-type GaN" 2001 Materials Research Society (MRS) Spring meeting, Abstracts p. 179, San Francisco, USA (2001).

6. C. C. Kim, Jong Kyu Kim, J.-L. Lee, J. H. Je, M. S. Yi, D. Y. Noh, Y. Hwu, P. Ruterana, "Au catalyzed structural evoluation of Ni/Au contact to GaN" The 4th International Conference on Nitride Semiconductors (ICNS 4), Abstracts p. 48, Denver, Colorado, USA (2001).

7. K. H. Kim, C. M. Jeon, H. W. Jang, Jong Kyu Kim, J. H. Lee, J. –H. Lee, G. –H. Kim, K. –S. Lee, B. Lee, and Jong-Lam Lee, "The mechanism of Ti/Al/Ni/Au ohmic contact on AlGaN/GaN heterostructure field effect transistor" 2001 Materials Research Society (MRS) Fall meeting, Abstract p. 205, Boston, USA, Nov. 26~30 (2001).

8. K. A. Rickert, Jong Kyu Kim, Jong-Lam Lee, F. J. Himpsel, A. B. Ellis, T. F. Kuech, "X-ray photoemission determination of the surface Fermi level motion and pinning on n- and a-GaN during the formation of Au, Ni and Ti metal contacts" 2001 Materials Research Society (MRS) Fall meeting, Abstract p. 215, Boston, USA, Nov. 26~30 (2001).

9. Jong Kyu Kim, K. H. Kim, C. C. Kim, J. H. Je, J. S. Kwak, O.-H. Nam, Y. Park, K. A. Rickert, T. F. Kuech, and Jong-Lam Lee, "Synchrotron radiation photoemission spectroscopy study of Pt transparent ohmic contacts on p-type GaN during annealing" 2001 Materials Research Society (MRS) Fall meeting, Abstract p. 206, Boston, USA, Nov. 26~30 (2001).

10. [Invited] Jong-Lam Lee, Ho Won Jang, Jong Kyu Kim and Chang Min Jeon, "GaN blue-light-emitting diode using room-temperature ohmic contacts" International Symposium on photonics and Applications, Proceeding of SPIE  4598, p. 113~124, Singapore, Nov. 26-30, (2001).

 

~2000

1. [Invited] Jong-Lam Lee, Jong Kyu Kim, Ho Won Jang, and Chang Min Jeon "Ohmic contact on p-type GaN and its application to the fabrication of GaN blue light emitting diode" Proceeding of 2000 China-Korea Joint Symposium on Semiconductor Physics and Device, Xian, China, p. 25~25 (2000).

2. [Invited] Jong Kyu Kim, H. W. Jang, C. M. Jeon and Jong-Lam Lee, "Ohmic contacts on p-type GaN for blue-light emitting devices.", The 3rd International Symposium on the Advanced Functional Materials in the North-East Region, Chejudo, Korea, Oct. 10-13, (2000).

3.  Jong Kyu Kim, Jong-Lam Lee, J. W. Lee, Y. Park and T. Kim, K.-J. Kim, B. Kim, S. W. Ryu, C. Jeon, S. Y. Han, Y-H. Cho. J. H. Je, " Evidence of band bending at the surface of p-type GaN measured by synchrotron radiation photoemission spectroscopy", 42nd 2000 Electronic Materials Conference, Univ. of Denver, Denver, Colorado, USA, June 21~23 (2000).

4. Jong Kyu Kim, Jong-Lam Lee, T. S. Cho, J. H. Je, J. W. Lee, Y. Park and T. Kim, "Effect of surface treatment on the change of domain size in Pd contact on p-type GaN" 42nd 2000 Electronic Materials Conference, Univ. of Denver, Denver, Colorado, USA, June 21~23 (2000).

5. K. A. Rickert, Jong Kyu Kim, F. J. Himpsel, A. B. Ellis, J. -L. Lee and T. F. Kuech, "Surface photovoltage effects in photoemission from Au-GaN interfaces: Importance for band bending evaluation" 2001 Synchrotron radiation center user's meeting, Madison, WI, USA, August (2001).

6. C. C. Kim, Jong Kyu Kim, J.-L. Lee, J. H. Je, M. S. Yi, D. Y. Noh, Y. Hwu, P. Ruterana, "Structural evolution of Ni/Au contacts on  GaN(000l)" 2000 Materials Research Society (MRS) Fall meeting, Abstracts p179, Boston, USA (2000)

7. H. W. Jang, C. M. Jeon, Jong Kyu Kim, and J.-L. Lee, "Nonalloyed Ti/Al ohmic contact ro n-type GaN" 2000 Materials Research Society (MRS) Fall meeting, Abstract p. 149, Boston, USA(2000).

8. Jong-Lam Lee, Jong Kyu Kim, J. W. Lee, Y. Park and T. Kim, "Reduction of Ohmic Contact Resistivity on P-type GaN by Surface Treatment" 3rd Int. Conf. on Nitride Compounds, Montpellier, France, July 5-10 (1999).

9. H. Shin, T. Kim, Jong Kyu Kim, J. Lee, J. Cho, S. H. Chae, Y. Park, and T. Kim, "The effect of surface treatment on p-GaN ohmic contact" The 9th Seoul International Symposium on the Physics of Semiconductors and Applications. Korea Univ., Seoul, Korea, Nov. 6-7 (1998).