A new approach to prepare efficient blue AIE emitters for undoped OLEDs

Jing Huang; Runli Tang; Tian Zhang; Qianqian Li; Gui Yu; Shuyi Xie; Yunqi Liu; Shanghui Ye; Jingui Qin; Zhen Li

doi:10.1002/chem.201303522

A new approach to prepare efficient blue AIE emitters for undoped OLEDs

Chemistry. 2014 Apr 25;20(18):5317-26. doi: 10.1002/chem.201303522. Epub 2014 Mar 24.

Authors

Jing Huang¹, Runli Tang, Tian Zhang, Qianqian Li, Gui Yu, Shuyi Xie, Yunqi Liu, Shanghui Ye, Jingui Qin, Zhen Li

Affiliation

¹ Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Opto-Electronic Materials, Wuhan University, Wuhan 430072 (P.R. China), Fax: (+86) 27-68756757.

PMID: 24665038
DOI: 10.1002/chem.201303522

Abstract

Two aggregation-induced emission active luminogens (TPE-pTPA and TPE-mTPA) were successfully synthesized. For comparison, another six similar compounds were prepared. Because of the introduced hole-dominated triphenylamine (TPA), fluorene groups with high luminous efficiency, and unconjugated linkages, the π conjugation length of the obtained luminogens is effectively restricted to ensure their blue emission. The undoped organic light-emitting diodes based on TPE-pTPA and TPE-mTPA exhibited blue or deep-blue emissions, low turn-on voltages (3 V), and high electroluminescence efficiencies with Lmax, ηC,max, and ηP,max values of up to 26,697 cd m(-2), 3.37 cd A(-1), and 2.40 Lm W(-1).

Keywords: aggregation-induced emission; blue emitters; luminescence; organic light-emitting diodes; tetraphenylethene.