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Issue 46, 2016
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Reduction of the singlet–triplet energy gap of a thermally activated delayed fluorescence emitter by molecular interaction between the host and the emitter

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Abstract

We reported the comparative effect of 1,3-bis(9H-carbazol-9-yl) benzene (mCP) and 1,3,5-tris(N-phenylbenzimidazole-2-yl)benzene (TPBI) hosts on the PL characteristics of 2-phenyl-4′-carbazole-9H-thioxanthen-9-one-10,10-dioxide (TXO-PhCz). Strong interaction between TXO-PhCz and TPBI can be observed, leading to the lower singlet–triplet energy gap of 8.8 meV and non-monotonic increase of ΦTotle, ΦD, and ΦP with temperature. OLEDs based on TXO-PhCz:TPBI films afford a maximum current efficiency of 71.9 cd A−1, a maximum power efficiency of 45.2 lm W−1, and a maximum EQE of 23.2%.

Graphical abstract: Reduction of the singlet–triplet energy gap of a thermally activated delayed fluorescence emitter by molecular interaction between the host and the emitter

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Publication details

The article was received on 25 Jul 2016, accepted on 06 Oct 2016 and first published on 06 Oct 2016


Article type: Communication
DOI: 10.1039/C6TC03155B
Citation: J. Mater. Chem. C, 2016,4, 10776-10780
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    Reduction of the singlet–triplet energy gap of a thermally activated delayed fluorescence emitter by molecular interaction between the host and the emitter

    L. Xie, G. Han, Y. Chen, H. Wang, X. Kong, X. Wei, J. Liu, Y. Yi, B. Chen, P. Wang and Y. Wang, J. Mater. Chem. C, 2016, 4, 10776
    DOI: 10.1039/C6TC03155B

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