Organic semiconducting Materials : OLED, OPV, OTFT
Nanostructured materials and their devices; nanomaterials; nano-sized objects of organic semiconductor
Photonic organic materials : Linear and nonlinear optical materials

1991.01 ~ 1992.05 Postdoctoral Research Fellow The State University of New York, Buffalo, USA.
1992.05 ~ 1995.02 Senior Research Scientist, Korea Institute of Science and Technology
1995.03 ~ 2005.02 Professor, Kyung Hee University, College of Engineering
2002.01 ~ 2005.12 Guest Professor, Dalian University of Technology, China
2003.03 ~ 2005.02 Research Associate, University of Washington, WA, USA
2005.03 ~ present Professor, Korea University, College of Science
2014.07 ~ 2018.07 Director, Institute of Basic Science, Korea University
2015.12 ~ present Director, LG Display-Korea University Cooperation Center
2015.03 ~2018.02 Vice President for Administration and Finance, Planning and Budget/ Future Strategy, Korea University
2013.09 ~ present Director, BK21 center in Chemistry, Korea University

2002 “Miwon” Award for Outstanding Researcher given by Owner of Kyung Hee Academy Foundation
2013 TORAY POLYMER AWARD, The polymer Society of Korea, Toray Advanced Materials Korea Inc.
2019 “Woongbi-Jang” (Order of Science and Technology Merit), Ministry of Science and ICT, KOREA