Construction of efficient blue AIE emitters with triphenylamine and TPE moieties for non-doped OLEDs
| Main Authors: | Huang, Jing, Jiang, Yibin, Yang, Jie, Tang, Runli, Xie, Ni, Li, Qianqian, Kwok, Hoi Sing, Tang, Ben Zhong, Li, Zhen |
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| Format: | Article Journal |
| Terbitan: |
, 2014
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| Online Access: |
https://zenodo.org/record/858642 |
Daftar Isi:
- 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 p-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 Lmax, ηC,max, and ηP,max of up to 8160 cd m-2 , 3.79 cd A-1, and 2.94 Im W-1 respectively, have also been obtained, further validating our rational design of blue AIE fluorophores.