27 August 2009 High efficiency deep-blue and white phosphorescent OLEDs
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Abstract
We report studies on blue and white organic light-emitting devices (OLEDs) based on the deep-blue electrophosphorescent dye iridium(III) bis(4',6'-difluorophenylpyridinato)tetrakis(1-pyrazolyl)borate (FIr6). Using high triplet energy charge transport layers and a dual-emissive-layer structure as well as the p-i-n device structure, we have achieved external quantum efficiencies of 20% and maximum power efficiency of 36 lm/W in these deep-blue OLEDs. White OLEDs with a CRI of 79 and a maximum power efficiency of 40 lm/W were also demonstrated by incorporating red and green phosphorescent dopants together with FIr6.
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Jiangeng Xue, Sang-Hyun Eom, Ying Zheng, Edward Wrzesniewski, Neetu Chopra, Jaewon Lee, Franky So, "High efficiency deep-blue and white phosphorescent OLEDs", Proc. SPIE 7415, Organic Light Emitting Materials and Devices XIII, 741511 (27 August 2009); doi: 10.1117/12.829598; https://doi.org/10.1117/12.829598
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