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Sky-blue thermally activated delayed fluorescence material employing a diphenylethyne acceptor for organic light-emitting diodes

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Abstract

The strong electronegativity of sp-hybridized carbons, contributed by their large s character (50%), inspired the development of diphenylethyne as an electron acceptor to construct a sky-blue thermally activated delayed fluorescence material, 1,2-bis(4-(10H-phenoxazin-10-yl)phenyl)ethyne (DPE-DPXZ), using 10H-phenoxazine (PXZ) as an electron donor fragment. A sky-blue organic light-emitting diode employing DPE-DPXZ as the emitter demonstrated an external quantum efficiency exceeding 10%. Furthermore, another alkyne derivative, 1,2-bis(4-(9,9-dimethylacridin-10(9H)-yl)phenyl)ethyne (DPE-DDMAc), in combination with 9,9-dimethyl-9,10-dihydroacridine (DMAc) as the donor was also studied to explore the singlet–triplet splitting energy governed by donor–acceptor alternation.

Graphical abstract: Sky-blue thermally activated delayed fluorescence material employing a diphenylethyne acceptor for organic light-emitting diodes

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Publication details

The article was received on 21 Jun 2017, accepted on 19 Nov 2017 and first published on 20 Nov 2017


Article type: Paper
DOI: 10.1039/C7TC02763J
Citation: J. Mater. Chem. C, 2018, Advance Article
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    Sky-blue thermally activated delayed fluorescence material employing a diphenylethyne acceptor for organic light-emitting diodes

    Z. He, X. Cai, Z. Wang, Y. Li, Z. Xu, K. Liu, D. Chen and S. Su, J. Mater. Chem. C, 2018, Advance Article , DOI: 10.1039/C7TC02763J

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