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Chien-Jung Chiang, Alpay Kimyonok, Marc K. Etherington, Gareth C. Griffiths, Vygintas Jankus, Figen Turksoy and Andy P. Monkman Ultrahigh Efficiency Fluorescent Single and Bi-Layer Organic Light Emitting Diodes: The Key Role of Triplet Fusion Advanced Functional Materials 23

Version of Record online: 24 SEP 2012 | DOI: 10.1002/adfm.201201750

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A new family of anthracene core emitters where the lowest triplet state has less than half the energy of the next highest triplet level is developed. The triplet fusion becomes highly efficient, resulting in fluorescent organic light emitting diode (OLED) devices of very simple structure, that far exceed the 25% external quantum efficiency limit due to the efficient singlet generation from triplet fusion in the device.

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