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Synthesis, aggregation-induced emission and electroluminescent properties of three new phenylethylene derivative comprising carbazole and (dimesitylboranyl)phenyl groups

Abstract

It is essential for light-emitting materials to possess high fluorescence intensity in solid-state and stable charge-transporting capability aiming to construct organic light-emitting diodes (OLEDs) with outstanding performance. In this paper, three phenylethene derivatives, 3-(4-(dimesitylboryl)phenyl)-6-(1,2,2-triphenylvinyl)-9-ethyl-9H-carbazole (DBPTECZ),3-(4-(dimesitylboryl)phenyl)-6-(1,2-diphenylvinyl)-9-ethyl-9H-carbazole (DBPDPECZ) and 3-(1-(4'-(dimesitylboryl)-[1,1'-biphenyl]-4-yl)-2-phenylvinyl)-9-ethyl-9H-carbazole (DBBPPECZ) with hole-transporting group (carbazole) and electron-transporting group (dimesitylboranyl)phenyl group) are synthesized and sufficiently characterized by elemental analysis and NMR spectroscopy. All the three compounds show typical AIE features with strong solid-state fluorescence. Besides, they also possess good thermal stabilities with Td of 219 °C, 188 °C and 167 °C respectively. Furthermore, the non-doped OLED devices employing DBPTECZ, DBPDPECZ, and DBBPPECZ as function layer are fabricated, showing remarkable performance with blue-green, deep blue and sky blue emission, respectively. Lmax of the three molecules reaches up to 21054 cd m-2, 4376 cd m−2 and 12080 cd m−2, and ηC,max are 3.34 cd A−1, 2.34 cd A−1 and 1.73 cd A−1, respectively. These results demonstrate that the present compounds are promising candidates for the OLEDs.

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Publication details

The article was received on 31 Aug 2017, accepted on 06 Oct 2017 and first published on 09 Oct 2017


Article type: Paper
DOI: 10.1039/C7TC03968A
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    Synthesis, aggregation-induced emission and electroluminescent properties of three new phenylethylene derivative comprising carbazole and (dimesitylboranyl)phenyl groups

    H. Shi, X. Zhang, C. Gui, S. Wang, L. Fang, Z. Zhao, S. Chen and B. Z. Tang, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC03968A

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