An Organic Molecule with Asymmetric Structure Exhibiting Aggregation‐Induced Emission,Delayed Fluorescence,and Mechanoluminescence |
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| Authors: | Shidang Xu Dr. Tingting Liu Dr. Yingxiao Mu Dr. Yi‐Fan Wang Prof. Zhenguo Chi Dr. Chang‐Cheng Lo Prof. Siwei Liu Prof. Yi Zhang Dr. Alan Lien Prof. Jiarui Xu |
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| Affiliation: | 1. PCFM Lab and GD HPPC Lab, State Key Laboratory of Optoelectronic Material and Technologies, School of Chemistry and Chemical Engineering, Sun Yat‐sen University, Guangzhou 510275 (China);2. Shenzhen China Star Optoelectronics Technology Co., Ltd, Guangdong (China);3. TCL Corporate Research, Guangdong (China) |
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| Abstract: | Compounds displaying delayed fluorescence (DF), from severe concentration quenching, have limited applications as nondoped organic light‐emitting diodes and material sciences. As a nondoped fluorescent emitter, aggregation‐induced emission (AIE) materials show high emission efficiency in their aggregated states. Reported herein is an AIE‐active, DF compound in which the molecular interaction is modulated, thereby promoting triplet harvesting in the solid state with a high photoluminescence quantum yield of 93.3 %, which is the highest quantum yield, to the best of our knowledge, for long‐lifetime emitters. Simultaneously, the compound with asymmetric molecular structure exhibited strong mechanoluminescence (ML) without pretreatment in the solid state, thus exploiting a design and synthetic strategy to integrate the features of DF, AIE, and ML into one compound. |
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| Keywords: | aggregation fluorescence luminescence materials science solid‐state structures |
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