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Issue 34, 2018
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Efficient solution-processed orange-red organic light-emitting diodes based on a novel thermally activated delayed fluorescence emitter

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Abstract

A novel thermally activated delayed fluorescence (TADF) emitter 1,2,3,4-tetrakis(3,6-di-tert-butyl-9H-carbazol-9-yl)thianthrene 5,5,10,10-tetraoxide (4t-BuCzTTR) was designed and synthesized for solution-processed red organic light-emitting diodes (OLEDs). With appropriate component segments and a well-arranged molecular structure, 4t-BuCzTTR successfully exhibits red fluorescence, significant TADF characteristics, excellent thermal stability and good solution processability. By using 4t-BuCzTTR as the emitter, the optimized doped OLED exhibits an orange-red emission with a peak at 592 nm and a high maximum external quantum efficiency of 6.2%. To the best of our knowledge, the result is not only higher than the theoretical limits of traditional fluorescent OLEDs, but also among the highest results of the reported solution-processed red OLEDs based on pure organic emitters, indicating the superiority of 4t-BuCzTTR.

Graphical abstract: Efficient solution-processed orange-red organic light-emitting diodes based on a novel thermally activated delayed fluorescence emitter

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Publication details

The article was received on 05 May 2018, accepted on 27 Jul 2018 and first published on 28 Jul 2018


Article type: Paper
DOI: 10.1039/C8TC02179A
Citation: J. Mater. Chem. C, 2018,6, 9152-9157
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    Efficient solution-processed orange-red organic light-emitting diodes based on a novel thermally activated delayed fluorescence emitter

    X. Li, K. Wang, Y. Shi, M. Zhang, G. Dai, W. Liu, C. Zheng, X. Ou and X. Zhang, J. Mater. Chem. C, 2018, 6, 9152
    DOI: 10.1039/C8TC02179A

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