期刊
APPLIED PHYSICS LETTERS
卷 101, 期 9, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4749285
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资金
- Funding Program for World-Leading Innovative R & D on Science and Technology (FIRST)
We have designed and synthesized a high-efficiency purely organic luminescent material, 2,4-bis{3-(9H-carbazol-9-yl)-9H-carbazol-9-yl}-6-phenyl-1,3,5-triazine (CC2TA) comprising the bicarbazole donor and phenyltriazine acceptor units, which is capable of emitting thermally activated delayed fluorescence. The molecular design of CC2TA allows spatial separation of HOMO and LUMO on the donor and acceptor fragments, respectively, leading to an exceptionally small singlet-triplet exchange energy (Delta E-ST = 0.06 eV) together with a high triplet energy. Furthermore, a high external electroluminescence quantum efficiency as high as 11% +/- 1% has been achieved in the sky-blue organic light-emitting diodes employing CC2TA as an emitter. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4749285]
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