Highly efficient organic light-emitting diodes from delayed fluorescence

Hiroki Uoyama, Kenichi Goushi, Katsuyuki Shizu, Hiroko Nomura and Chihaya Adachi ()
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Hiroki Uoyama: Center for Organic Photonics and Electronics Research, Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
Kenichi Goushi: Center for Organic Photonics and Electronics Research, Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
Katsuyuki Shizu: Center for Organic Photonics and Electronics Research, Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
Hiroko Nomura: Center for Organic Photonics and Electronics Research, Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
Chihaya Adachi: Center for Organic Photonics and Electronics Research, Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan

Nature, 2012, vol. 492, issue 7428, 234-238

Abstract: A class of metal-free organic electroluminescent molecules is designed in which both singlet and triplet excitons contribute to light emission, leading to an intrinsic fluorescence efficiency greater than 90 per cent and an external electroluminescence efficiency comparable to that achieved in high-efficiency phosphorescence-based organic light-emitting diodes.

Date: 2012
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DOI: 10.1038/nature11687

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