title: A new approach to prepare efficient blue AIE emitters for undoped OLEDs.
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).
authors.affiliation: Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Opto-Electronic Materials, Wuhan University, Wuhan 430072 (P.R. China), Fax: (+86) 27-68756757.
authors.forename: Jing
authors.initials: J
authors.lastname: Huang
authors.forename: Runli
authors.initials: R
authors.lastname: Tang
authors.forename: Tian
authors.initials: T
authors.lastname: Zhang
authors.forename: Qianqian
authors.initials: Q
authors.lastname: Li
authors.forename: Gui
authors.initials: G
authors.lastname: Yu
authors.forename: Shuyi
authors.initials: S
authors.lastname: Xie
authors.forename: Yunqi
authors.initials: Y
authors.lastname: Liu
authors.forename: Shanghui
authors.initials: S
authors.lastname: Ye
authors.forename: Jingui
authors.initials: J
authors.lastname: Qin
authors.forename: Zhen
authors.initials: Z
authors.lastname: Li
keywords: aggregation-induced emission; blue emitters; luminescence; organic light-emitting diodes; tetraphenylethene