双苯磺酰基苯类延迟荧光材料的合成及电致发光性质

doi:10.11896/cldb.21060007

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Abstract Two thermally activated delayed fluorescence (TADF) materials with a twisted D-A-D structure, 1,3-bis(3-diphenylaminobenzenesulfonyl)benzene (PSPA) and 1,3-bis((3-(10H phenoxazin-10-yl)phenyl)sulfonyl)benzene (PSPP), were designed and synthesized by using 1,3-bis(phenylsulfonyl)benzene as the acceptor group (A) and diphenylamine/phenoxazine as the donor groups (D). A large twisted structure can be achieved by the attachment of the donor group at the 3,3′-position of 1,3-bis(phenylsulfonyl)benzene. Limited overlap of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) was achieved, which obtained smaller ΔE_STs (0.21 eV for PSPA and 0.016 eV for PSPP) and better PLQYs (4.36% for PSPA and 37.36% for PSPP). The transient fluorescence spectra show that both emitters possess typical delayed fluorescence characteristics. The PSPA-based device shows blue emission (450 nm), and the PSPP-based device emits green light at 520 nm with red-shifted emission due to the strong electron-donating ability of phenoxazine. The PSPP-based device obtained a greater maximum external quantum efficiency (EQE_max) of 4.48% than that of PSPA.

Key words： thermally activated delayed fluorescence organic light-emitting diodes bis(phenylsulfonyl)benzene electroluminescent property

Published: 25 February 2023 Online: 2023-03-02

CLC number:

O621.22

Fund:Natural Science Foundation of China (61705154, 21905048).

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	Articles by authors
	WANG Dahao
	XIE Fengming
	WEI Huaixin
	HU Yingyuan
	ZHAO Xin

Cite this article:

WANG Dahao,XIE Fengming,WEI Huaixin, et al. Synthesis and Electroluminescence Properties of Delayed Fluorescent Materials Based on Bis(benzenesulfonyl)benzene[J]. Materials Reports, 2023, 37(4): 21060007-5.

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http://www.mater-rep.com/EN/10.11896/cldb.21060007 OR http://www.mater-rep.com/EN/Y2023/V37/I4/21060007

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