A New Approach to Prepare Efficient Blue AIE Emitters for Undoped OLEDs |
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| Authors: | Jing Huang Runli Tang Tian Zhang Prof Qianqian Li Prof Gui Yu Shuyi Xie Prof Yunqi Liu Dr Shanghui Ye Prof Jingui Qin Prof Zhen Li |
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| 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;2. Organic Solids Laboratories, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100080 (P.R. China);3. Key Laboratory for Organic Electronics and Information Displays (KLOEID), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing 210046 (P.R. China) |
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| 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. |
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| Keywords: | aggregation‐induced emission blue emitters luminescence organic light‐emitting diodes tetraphenylethene |
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