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Yi-Lu Chang, Yin Song, Zhibin Wang, Michael G. Helander, Jacky Qiu, Lily Chai, Zhiwei Liu, Gregory D. Scholes and Zhenghong Lu Highly Efficient Warm White Organic Light-Emitting Diodes by Triplet Exciton Conversion Advanced Functional Materials 23

Article first published online: 17 SEP 2012 | DOI: 10.1002/adfm.201201858

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A novel four-color white organic light-Organic Light-Emitting Diodes emitting diode architecture employing exciton trapping green molecules which efficiently perform triplet exciton down conversion to co-deposited yellow and red emitters achieves record high performance combinations of external quantum efficiency (EQE) and color rendering index (CRI): an EQE of 23.3% at 1000 cd/m2 and an EQE of 20.4% at 5000 cd/m2 with a CRI of 84 and 85, respectively, excellent for solid-state lighting.

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