Prof. Han is currently a Professor Emeritus at Seoul National University, Seoul, Korea. His research field of interest is semiconductor device including TFT (Thin Film Transistor) for display application.

He started his professional career as an Assistant Professor in Department of Electrical and Computer Engineering at the State University of New York (1979-1984), and moved to Seoul National University in 1984 where he was later appointed as the Dean of the College of Engineering. He became the Board of Director at SID (Society for Information Display) in 2000, and has served as president of various academic societies such as the Korea Nano Technology Research Society and Korea Institute of Electrical Engineers.

He has received various prestige awards such as Korea National Academy Award (Ministry of Education) in 2003, Korea Engineering Award (Ministry of Science &Technology) in 2006, Highest Science and Technology Medal (President of Korea) in 2007, SID Fellow Award in 2009, and Best Scientist and Engineers Award (President of Korea) in 2010.

He received the B.S. degree from the department of the Electrical Engineering at the Seoul National University, Korea in 1971. He then received the M.S. degree from the department of Electrical Engineering at the University of Michigan in 1975 and Ph.D. degree from the department of Electrical Engineering at the Johns Hopkins University in 1979.