期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 6, 期 45, 页码 12355-12363出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8tc04411b
关键词
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资金
- National Key Research and the Development Program of China [2016YFB0401302]
- Ministry of Science and Technology of China (973 Program) - MOST
- Ministry of Science and Technology of China - MOST [2015CB655004]
- Science and Technology Program of Guangzhou [2017A050503002, 201710010021]
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.
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