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An Organic Molecule with Asymmetric Structure Exhibiting Aggregation‐Induced Emission, Delayed Fluorescence, and Mechanoluminescence
Author(s) -
Xu Shidang,
Liu Tingting,
Mu Yingxiao,
Wang YiFan,
Chi Zhenguo,
Lo ChangCheng,
Liu Siwei,
Zhang Yi,
Lien Alan,
Xu Jiarui
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201409767
Subject(s) - mechanoluminescence , quantum yield , aggregation induced emission , fluorescence , photoluminescence , photochemistry , quenching (fluorescence) , molecule , oled , quantum efficiency , materials science , yield (engineering) , intersystem crossing , solid state , luminescence , chemistry , nanotechnology , optoelectronics , singlet state , excited state , organic chemistry , optics , physics , layer (electronics) , nuclear physics , metallurgy
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.