Highly efficient organic light-emitting diodes with a silole-based compound
- 16 July 2002
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 81 (4), 574-576
- https://doi.org/10.1063/1.1495542
Abstract
Efficient light emission was obtained in a silole-based organic light-emitting diode. A high luminous current efficiency of 20 cd/A, corresponding to an external quantum efficiency of 8%, was achieved. The apparent violation of the upper theoretical limit of 5.5% for the external quantum efficiency of a singlet emitter is discussed. With a suitably designed cathode, a high power efficiency of ∼14 lm/W was obtained. A strong dependence of the power efficiency on the thickness of layer is also observed and explained.
Keywords
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