Friday, May 22, 2015

SID & IEEE Student Chapters Seminar: "Improving Solar Cell Efficiency beyond Shockley-Quisser Limit by Singlet Fission—Exciton Dynamics in Rubrene and Tetracene Thin Films" by Dr. Jiun-Haw Lee 5.27.15/11:00am-12:00pm/ CREOL RM A214

SID & IEEE Student Chapters Seminar: "Improving Solar Cell Efficiency beyond Shockley-Quisser Limit by Singlet Fission—Exciton Dynamics in Rubrene and Tetracene Thin Films" by Dr. Jiun-Haw Lee
Wednesday, May 27, 2015 11:00 AM to 12:00 PM
CREOL Room A214

Celebrating the International Year of Light 2015
     

Dr. Jiun-Haw Lee
Graduate Institute of Photonics and Optoelectronics and Department of Electrical Engineering, National Taiwan University

Abstract:
Exciton fission is a process to split one singlet exciton into two triplet excitons. By dissociating those two excitons into carriers, it is possible to generate super high internal quantum efficiency (> 100%, ideally 200%). In our experiments, transient photoluminescence (TRPL) was used to study exciton fission and fusion dynamics characteristics. Fusion rate increased with decreasing the film thickness, which was due to the triplet exciton confinement. Excitons were quenched by Si substrate which showed the possible energy transfer process between organic material and Si.

Biography:
Dr. Jiun-Haw Lee received the B.S.E.E., M.S.E.E., and Ph.D. degrees in electrical engineering in 1994, 1995, and 2000, respectively, all from National Taiwan University, Taipei, Taiwan.From 2000 to 2003, he was with the RiTdisplay Corporation as the director. Since 2003, he joined the faculty of National Taiwan University in the Graduate Institute of Photonics and Optoelectronics and the Department of Electrical Engineering, where he is currently a professor. His research interests include organic optoelectronic devices, display and lighting technologies, and solar cells.He has co-authored over 80journal papers, over 250conference papers, and 50 patents.

For more information:
SID UCF Student Branch Chair: Fenglin (Maple) Peng
SID UCF Student chapter advisor: Prof. Shin-Tson Wu
IEEE Photonics Society Chair: Ruidong Zhu

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