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Journal of Photonics for Energy

Phosphorescent organic light-emitting diodes for high-efficacy long-lifetime solid-state lighting
Author(s): Peter A. Levermore; Alexey B. Dyatkin; Zeinab Elshenawy; Huiqing Pang; Jeffrey A. Silvernail; Emory Krall; Raymond C. Kwong; Ruiqing Ma; Michael S. Weaver; Julie J. Brown; Xiangfei Qi; Stephen R. Forrest
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Paper Abstract

We report data for a pair of singlestack all-phosphorescent 15×15  cm2 organic light emitting-diode (OLED) light panels with high efficacy, long lifetime, and very low operating temperature: Panel 1 has 62  lm/W efficacy, CRI = 81 and lifetime to LT70 = 18,000  h at 1000  cd/m2, while Panel 2 has 58  lm/W efficacy, CRI = 82 and lifetime to LT70 = 30,000  h at 1000  cd/m2. Operating at a higher luminance of 3000  cd/m2, Panel 2 has 49  lm/W efficacy with lifetime to LT70 = 4000  h. Excellent panel lifetime is enabled by a stable light blue phosphorescent materials system. Panel temperatures are within 10°C of ambient temperature at 3000  cd/m2. Panel 2 was further used as a building block to demonstrate an all-phosphorescent OLED luminaire for under-cabinet lighting applications. Operating at approximately 3000  cd/m2, the luminaire delivers 570 lm with 52  lm/W total system efficacy, CRI = 86 and CCT = 2940  K.

Paper Details

Date Published: 26 March 2012
PDF: 9 pages
J. Photon. Energy. 2(1) 021205 doi: 10.1117/1.JPE.2.021205
Published in: Journal of Photonics for Energy Volume 2, Issue 1
Show Author Affiliations
Peter A. Levermore, Universal Display Corp. (United States)
Alexey B. Dyatkin, Universal Display Corp. (United States)
Zeinab Elshenawy, Universal Display Corp. (United States)
Huiqing Pang, Universal Display Corp. (United States)
Jeffrey A. Silvernail, Universal Display Corp. (United States)
Emory Krall, Universal Display Corp. (United States)
Raymond C. Kwong, Universal Display Corp. (United States)
Ruiqing Ma, Universal Display Corp. (United States)
Michael S. Weaver, Universal Display Corp. (United States)
Julie J. Brown, Universal Display Corp. (United States)
Xiangfei Qi, Univ. of Michigan (United States)
Stephen R. Forrest, Univ. of Michigan (United States)

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