신소재공학과

Seminar

Date 20170328 

Regular Seminar Announcement



■ Title: Self-healing phosphor: New paradigm for high-power LED lighting

                      
■ Speaker: Prof. Lim Won Bin (Jeonnam National University)

 

■ Date and time: 28th of March (Tue) 16:00

 

■ Venue: KAIST Applied Engineering B/D(W1), Multimedia Lecture Hall (1st Floor)

  

 Abstract: Phosphor-converted white light-emitting diodes (pc-WLEDs) are the efficient light source that has multifarious applications in lighting, high-tech displays, and electronic devices. One of the biggest challenge of pc-WLEDs are the thermal quenching, in which phosphor suffers from emission loss with increasing temperature during high-power LED operation and is an inevitable drawback for any existing phosphor. Here we report for the first time, a new blue-emitting phosphor that doesn’t exhibit thermal quenching revealing zero-emission loss even upto 250ºC. This phenomena of non-thermal quenching, denoted as self-healing phosphor, portrays the ability of phosphor in resurrecting the emission loss and sustaining the luminescence with increasing temperature. This finding would initiate the exploration of many self-healing phosphors with non-thermal quenching for high-power LED applications.

No. Subject Author Date Views
Notice 6/16 (Fri) Dr. Bok Yeop Ahn (Harvard University) ADMINI 2017.06.13 1442
221 6/12 (Mon) Prof. C. Suryanarayana (University of Central Florida) ADMINI 2017.06.05 730
220 6/2 (fri) Robert M. Ulfig (CAMECA Instruments Inc) ADMINI 2017.06.01 641
219 6/5 (Mon) Dr. Aron Varga/Dr. Andriy Lotnyk ADMINI 2017.05.30 801
218 5/30 (Tue) Prof. Chang Hyeon Ko (Sookmyung Univ) ADMINI 2017.05.26 834
217 5/23 (Tue) Prof. Don Hyeong Ha (Choongang university) ADMINI 2017.05.19 556
216 5/16 (Tue) Prof. Eun Sun Cho (KAIST CBE) ADMINI 2017.05.10 730
215 5/2 (Tue) Prof. Seung Woo Lee (SKKU) ADMINI 2017.04.28 766
214 4/25 (Tue) Prof. Hyeong Sup Choi (Seoul National University of Science and Technology) ADMINI 2017.04.20 687
213 4/11 (Tue) Prof. Kyeong Sook Choi (Eulji National University, Medical school) ADMINI 2017.04.07 760
212 4/4 (Tue) Mrs. Eun Joo Jang (Samsung) ADMINI 2017.03.31 833
» 3/28 (Tue) Prof. Lim Won Bin (Jeonnam National University) ADMINI 2017.03.24 750
210 3/21 (Tue) Prof. Park Sang Duk (Seoul National University) ADMINI 2017.03.20 660
209 3/14 (Tue) Dr. Hwa Nyun Kim (LG) ADMINI 2017.03.11 714
208 3/7(Tue) Prof. Joong Keun Park, Prof. Jung Yong Lee (KAIST) ADMINI 2017.03.02 673
207 02/28 (Tue) Prof. Steve Park (KAIST) ADMINI 2017.02.24 920
206 02/20 (Mon) Special Seminar Announcement, Prof. Hwang (Seoul National University) ADMINI 2017.02.14 891
205 02/08 (Wed) Special Seminar Announcement, Dr. Yong Ho Kang, UC Santa Barbara ADMINI 2017.02.02 1180
204 [Special Seminar] 12/23(Wed), Dr. Jaejin Kim (Chemical Sciences and Engineering Division, Argonne National Laboratory) ADMINI 2016.12.16 1082
203 12/13(Tue) Dr. Jae Yong Song (KRISS) ADMINI 2016.12.12 1103