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Issue 45, 2018
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Achieving highly efficient blue light-emitting polymers by incorporating a styrylarylene amine unit

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Abstract

A series of novel blue light-emitting polymers were designed and synthesized by incorporating a blue styrylarylene amine (DV) chromophore into the backbone of poly(9,9-dioctylfluorene). All the resultant polymers exhibit blue emission peaking at around 465 nm. The fabricated single layer polymer light-emitting devices based on PF-TD2DV2 consisting of 2 mol% of the DV moiety present an impressively high luminous efficiency of 5.47 cd A−1 with Commission International de L’Eclairage (CIE) coordinates of (0.15, 0.14). The luminous efficiency can be further improved to over 8 cd A−1 upon the incorporation of a hole transport layer of polyvinylcarbazole and the blending of a hole transport material N-([1,1′-biphenyl]-4-yl)-N-(9,9-dimethyl-9H-fluoren-2-yl)-9,9′-spirobifluoren-2-amine (BSFN) into the emissive layer. Of particular importance is that the luminous efficiency remains 7.40 cd A−1 at a brightness of 1000 cd m−2, and the devices exhibit excellent stability of electroluminescence with the variation of driving voltage from 3 to 10 V. These results demonstrate the great potential of this class of polymers for application in solution processed blue light-emitting diodes.

Graphical abstract: Achieving highly efficient blue light-emitting polymers by incorporating a styrylarylene amine unit

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Publication details

The article was received on 02 Sep 2018, accepted on 08 Oct 2018 and first published on 09 Oct 2018


Article type: Paper
DOI: 10.1039/C8TC04411B
Citation: J. Mater. Chem. C, 2018,6, 12355-12363
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    Achieving highly efficient blue light-emitting polymers by incorporating a styrylarylene amine unit

    F. Peng, Z. Zhong, Y. Ma, Z. Huang, L. Ying, J. Xiong, S. Wang, X. Li, J. Peng and Y. Cao, J. Mater. Chem. C, 2018, 6, 12355
    DOI: 10.1039/C8TC04411B

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