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 5/2 (Tue) Prof. Seung Woo Lee (SKKU) ADMINI 2017.04.28 61
214 4/25 (Tue) Prof. Hyeong Sup Choi (Seoul National University of Science and Technology) ADMINI 2017.04.20 165
213 4/11 (Tue) Prof. Kyeong Sook Choi (Eulji National University, Medical school) ADMINI 2017.04.07 262
212 4/4 (Tue) Mrs. Eun Joo Jang (Samsung) ADMINI 2017.03.31 345
» 3/28 (Tue) Prof. Lim Won Bin (Jeonnam National University) ADMINI 2017.03.24 335
210 3/21 (Tue) Prof. Park Sang Duk (Seoul National University) ADMINI 2017.03.20 327
209 3/14 (Tue) Dr. Hwa Nyun Kim (LG) ADMINI 2017.03.11 351
208 3/7(Tue) Prof. Joong Keun Park, Prof. Jung Yong Lee (KAIST) ADMINI 2017.03.02 313
207 02/28 (Tue) Prof. Steve Park (KAIST) ADMINI 2017.02.24 462
206 02/20 (Mon) Special Seminar Announcement, Prof. Hwang (Seoul National University) ADMINI 2017.02.14 496
205 02/08 (Wed) Special Seminar Announcement, Dr. Yong Ho Kang, UC Santa Barbara ADMINI 2017.02.02 707
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202 12/6 (Tue) Prof. KwangSup Eom (School of MSE, GIST) ADMINI 2016.12.02 675
201 [Special Seminar] 11/16(Wed), Dr. Seung-Kyun Kang (Dept. of MSE, University of Illinois at Urbana-Champaign) ADMINI 2016.11.16 676
200 11/14(Tue) Prof. Sangeun Chun (Dept. of MSE, Kyungpook National Univ.) ADMINI 2016.11.14 686
199 11/8(Tue) Dr. Nikolai Tsvetkov (EEWS, KAIST) ADMINI 2016.11.07 569
198 11/1(Tue) Prof. Seung Hwan Ko (Dept. of ME, Seoul National Univ.) ADMINI 2016.11.01 601
197 [Special Seminar] 10/19(Wed), Prof. Wei-Chuan Shih (Departments of Electrical & Computer Engineering, University of Houston) ADMINI 2016.10.18 572
196 10/18(Tue) Prof. Megumi Kawasaki (Dept. of MSE, Hanyang Univ.) ADMINI 2016.10.17 569