26 March 2012 Phosphorescent organic light-emitting diodes for high-efficacy long-lifetime solid-state lighting
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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.
© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE)
Peter A. Levermore, Peter A. Levermore, Alexey B. Dyatkin, Alexey B. Dyatkin, Zeinab Elshenawy, Zeinab Elshenawy, Huiqing Pang, Huiqing Pang, Jeffrey A. Silvernail, Jeffrey A. Silvernail, Emory Krall, Emory Krall, Raymond C. Kwong, Raymond C. Kwong, Ruiqing Ma, Ruiqing Ma, Michael S. Weaver, Michael S. Weaver, Julie J. Brown, Julie J. Brown, Xiangfei Qi, Xiangfei Qi, Stephen R. Forrest, Stephen R. Forrest, } "Phosphorescent organic light-emitting diodes for high-efficacy long-lifetime solid-state lighting," Journal of Photonics for Energy 2(1), 021205 (26 March 2012). https://doi.org/10.1117/1.JPE.2.021205 . Submission:
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