Highly simplified phosphorescent organic light emitting diode with >20% external quantum efficiency at >10,000 cd/m2
- 14 February 2011
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 98 (7), 073310
- https://doi.org/10.1063/1.3532844
Abstract
A simplified trilayer green phosphorescent organic light emitting diode with high efficiency and an ultralow efficiency roll-off has been demonstrated. In particular, the external quantum efficiency drops < 1 % from 100 to 5 , 000 cd / m 2 and remains as high as ∼ 21.9 % at 10 , 000 cd / m 2 . The power efficiency is also significantly improved, reaching 78.0 lm/W at 100 cd / m 2 , 50.5 lm/W at 5 , 000 cd / m 2 , and 42.8 lm/W at 10 , 000 cd / m 2 . The working mechanism of this simple device structure with an unprecedented high efficiency is also discussed.Keywords
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