Construction of efficient blue AIE emitters with triphenylamine and TPE moieties for non-doped OLEDs
In this paper, by merging the hole-dominated triphenylamine (TPA) and tetraphenylethene (TPE) moieties together with different linkage positions, four derivatives of 1,2-bis[4'-(diphenylamino)biphenyl-4-yl]-1,2-diphenylethene (2TPATPE) were successfully synthesized with confirmed structures, an...
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Veröffentlicht in: | Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2014-01, Vol.2 (11), p.2028-2036 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | In this paper, by merging the hole-dominated triphenylamine (TPA) and tetraphenylethene (TPE) moieties together with different linkage positions, four derivatives of 1,2-bis[4'-(diphenylamino)biphenyl-4-yl]-1,2-diphenylethene (2TPATPE) were successfully synthesized with confirmed structures, and their thermal, optical and electronic properties were fully investigated. Thanks to the introduction of the meta-linkage mode on the TPE core, their pi -conjugation length could be effectively restricted to ensure blue emission. The non-doped OLEDs based on these four emitters exhibit blue emissions from 443-466 nm, largely blue-shifted with respect to the green emission of 2TPATPE (514 nm). Meanwhile, good electroluminescence efficiencies with L sub(max), eta sub(C,max), and eta sub(P,max) of up to 8160 cd m super(-2), 3.79 cd A super(-1), and 2.94 Im W super(-1) respectively, have also been obtained, further validating our rational design of blue AIE fluorophores. |
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ISSN: | 2050-7526 2050-7534 |
DOI: | 10.1039/c3tc32207f |