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High efficiency above 20% in polymeric thermally activated delayed fluorescent organic light-emitting diodes by a host embedded backbone structure

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Abstract

A highly efficient polymeric thermally activated delayed fluorescent (TADF) organic light-emitting diode (OLED) was developed by synthesizing a copolymer with 9-vinylcarbazole (VCz) and 10,10′-((6-(4-((4-vinylbenzyl)oxy)phenyl)-1,3,5-triazine-2,4-diyl)bis(4,1-phenylene))bis(9,9-dimethyl-9,10-dihydroacridine) (VTD) repeating units. VCz was introduced as a monomer with a host function and VTD was included as a monomer with an emitter function. The feed ratio of 9-vinylcarbazole and VTD was controlled to study the effect of copolymer composition on the light-emitting performance of TADF OLEDs. It was described that the radical polymerization of the monomer mixture with a feed ratio of the TADF monomer of 10% produced a polymer which achieved a high external quantum efficiency of 22.0%.

Graphical abstract: High efficiency above 20% in polymeric thermally activated delayed fluorescent organic light-emitting diodes by a host embedded backbone structure

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Publication details

The article was received on 15 May 2019, accepted on 08 Aug 2019 and first published on 09 Aug 2019


Article type: Paper
DOI: 10.1039/C9PY00701F
Polym. Chem., 2019, Advance Article

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    High efficiency above 20% in polymeric thermally activated delayed fluorescent organic light-emitting diodes by a host embedded backbone structure

    Y. H. Park, H. J. Jang and J. Y. Lee, Polym. Chem., 2019, Advance Article , DOI: 10.1039/C9PY00701F

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