2011-2012 : Research Institute for Solar and Sustainable Energies (RISE), Director
2009-2011 : 국가연구시설장비진흥센터 운영위원회, 위원
2008-2012 : GIST Technology Institute (GTI), Director
2006-2016 : Samsung-GIST LED Research Center, Director
2002-2004 : GIST, Dean of Students and Academic Affairs
1995-2001 : Brain Korea (BK) 21 Program, Director
1995-2001 : GIST, School of Material Science and Engineering (MSE), Head of Department
1987-1995 : Electronics & Telecommunications Research Institute, Principal Researcher
1985-1987 : IBM T.J. Watson Research Center, Post Doctoral Fellow
HONORS_AWARDS
Order of Science and Technology Merit (과학기술훈장 웅비장, 2012년 4월)
한국진공학회 학술상 (한국진공학회, 2010년 2월)
대학 상위 10대 특허 등록 연구자상 (특허청, 2009년 11월)
GIST innovation technology award (GIST 대표혁신 기술상, 2007년 12월)
16th Best paper award in Science and Technology (16회 과학기술 우수논문상, 2006년 11월)
GIST Research Award (GIST 연구상, 2004, 2005, 2006, 2010, 2011, 2012, 2013, 2014, 2016년)
Science and Technology Medal (과학기술포장, 2005년 4월)
CONFERENCE COMMITTEE MEMBER
"SPIE Photonic west ", Program Committee Member (2013~present : USA)
"International Workshop on Zinc Oxide and Related Materials (IWZnO) ", Program Committee Member, and Advisory Committee Member (2014: Poland, 2016: Taiwan)
"Compound Semiconductor Week (CSW) ", International Advisory Committee Member (2015: Berlin)
"International Workshop on Nitride Semiconductors (IWN) ", Advisory Committee Member (2014: Poland, 2016 :USA)
"Int. Conf. on Nitride Semiconductors (ICNS)", Program Committee Member (2003: Japan, 2005: Germany), General Chair (2009: Korea), Int. Advisory Committee Member (2011: UK, 2015~present)
"International Conference on White Lights & Solid State Lighting (WLED) "General Chair (2014: Korea)
"International Meeting on Information Display(IMID) "Technical Program Committee/LEDs for Displays and Solid-State Lighting Chair (2012: Korea)
"Int. Symp. on Semiconductor Light Emitting Devices (ISSLED) ", Program Comittee (2012: Germany, 2014 : Taiwan)
"Int. Conf. on Surface Plasmon Photonics (SPP5)", Advisory Committee Member (2011: Korea)
"Photonics and Optoelectronics Meetings (POEM2009)", Program Committee Member (2009: China)
"Int. Conf. on Display and Solid State Lighting (DSSL)", Program Committee Member & Excutive Committee Member (2008: Korea)
"SPIE Optics+Photonics", Program Committee Member (2007, 2009, 2010, 2011, 2012: USA), Technical Organizing Committee & Conference Chair (2008: USA)
"Int. Conf. on II-VI Compounds", Program Committee Member (2007, Korea)
"Int. Workshop on Nitride Semiconductors (IWN)", Int. Advisory Committee Member (2006: Japan, 2008: Swizerland, 2010: USA, 2012: Japan)
"Int. Conf. on Metal Organic Vapor Phase Epitaxy (ICMOVPE)", Program Committee Member (2006: USA), Int. Advisory Comittee Member (2012: Korea, 2016: USA)
"Asia-Pacific Workshop on Widegap Semiconductors (APWS)", Executive Committee Member (2003: Japan, 2005: Taiwan), Int. Advisory Committee Member (2007: Korea, 2011: Japan), Organizing Committee (2013: Taiwan)
"Int. Conf. on Materials for Advanced Technology (ICMAT)", Scientific Committee Member (2005: Singapore)
"Blue 2004: Advanced LEDs and Lasers Conference", Program Committee Member (2004: Taiwan)
"Int. Symp. on Blue Lasers and Light Emitting Diodes (ISBLLED)", Int. Advisory Committee Member (2002, Spain), Organizing Committee Member (2004, Korea)
"Int. Conf. on Solid-State Lighting (ICSL)", SPIE's Int. Symp. on Optical Science and Technology, Program Committee Member (2001, 2002, 2003, 2004, 2005 : USA)
"Int. Symp. on Phys. of Semicon. & Applications (ISPSA)", Program Committee Member (1994-Present: Korea)
Research Interests
Growth & characterization of GaN and ZnO epilayers and nanostructure
Fabrication and characterization of high efficiency / power GaN and ZnO-based LEDs
Growth and characterization of nonpolar and semipolar LEDs
Growth of quantum dots for high efficient LEDs and solar cell
Realization of flexible device by using ZnO/organic hybrid heterostucture
Growth of graphene and its applications to LED, display, and solar cells
