题 目：Advances in GaN LEDs for Solid-state Lighting
报告人：Chua Soo Jin
时 间：12月12日 2014 ，周五下午，13:00-15:00
地 点：邯郸路校区微电子楼B213室

ABSTRACT
Solid-state lighting (SSL) which features the use of LEDs has made steady progress in terms of efficiency, one of the hall marks of this new form of lighting. Luminous efficacy of LEDs has increased from about 80 lumens/Watt to twice this value for new prototypes in the laboratories. LED lamps are now widely available commercially. In addition, the color quality is emerging as another attribute to push SSL to the next level of performance. Besides using SSL for illumination, it is also making inroads into horticulture applications where the spectrum can be tailored for the absorption by the plants’ chlorophyll. In the longer term, application in white light communication which demands the device to respond at high modulation speed has seen research moving into direct generation of white light without the use of phosphors for color conversion but through the use of nanotechnology such as quantum dots and nanorods. The talk will provide a summary of the progress and the new directions that SSL made in recent years and our contributions to its improvement.

Biography
Chua Soo Jin is Professor of Optoelectronics at the Department of Electrical and Computer Engineering, National University of Singapore (NUS). Concurrently, he serves as the Deputy Director of the Singapore-MIT Alliance (SMA), a position he has held since the Alliance was formed in 1999. He served as Executive Deputy Director of the Institute of Materials Research & Engineering (IMRE) from 2005 -2010 and is currently a member of its Management Committee. He conducts research on GaN MOCVD and ZnO growth by solution method. His research area is in optoelectronics devices and applications and has published over 400 papers in international journals and authored/co-authored 35 patents with 22 of them granted and 7 licensed. His h-index is 36 as recorded in ISI Web of Knowledge. He co-authored a book on Mathematical Physics and contributed to four book chapters. He has received awards for Outstanding Contribution to Research, Excellent Teacher and also as an Outstanding University Researcher in 1996, 1998 and 1999 respectively. He is the inventor of the Quantum Dot White LED and first to demonstrate the Quantum Dot Photodetector.
He was the Assistant Director of the Institute of Microelectronics (IME) when it was first formed in 1990 and established its wide industry contacts and research collaborations with the tertiary institutions during its first five formative years.

Prof. Chua is Sr. member of IEEE and the Optical Society of America. He served as Chairman of IEEE, Singapore Chapter from 1984 to 1986 and as Chairman of Education Committee, Region 10 from 1987 to 1988 and Vice-chairman of SPIE from 95-97.