Aggregation-Induced Emission by Molecular Design: A Route to High-Performance Light-Emitting Electrochemical Cells
Journal article, 2023
The emission efficiency of organic semiconductors (OSCs) often suffers from aggregation caused quenching (ACQ). An elegant solution is aggregation-induced emission (AIE), which constitutes the design of the OSC so that its morphology inhibits quenching π–π interactions and non-radiative motional deactivation. The light-emitting electrochemical cell (LEC) can be sustainably fabricated, but its function depends on motion of bulky ions in proximity of the OSC. It is therefore questionable whether the AIE morphology can be retained during LEC operation. Here, we synthesize two structurally similar OSCs, which are distinguished by that 1 features ACQ while 2 delivers AIE. Interestingly, we find that the AIE-LEC significantly outperforms the ACQ-LEC. We rationalize our finding by showing that the AIE morphology remains intact during LEC operation, and that it can feature appropriately sized free-volume voids for facile ion transport and suppressed non-radiative excitonic deactivation.
Aggregation Caused Quenching
Organic Semiconductor
Light-Emitting Electrochemical Cell
Aggregation-Induced Emission
Electrochemical Doping
Author
Shi Tang
LunaLEC AB
Umeå University
Zhi Wang
Xi'an Jiaotong University
Yanzi Xu
Xi'an Jiaotong University
Huili Ma
Nanjing Tech University
Jia Wang
Umeå University
Christian Larsen
LunaLEC AB
Umeå University
Dongfeng Dang
Polymer Technology
Xi'an Jiaotong University
Ergang Wang
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
L. Edman
LunaLEC AB
Umeå University
Angewandte Chemie - International Edition
1433-7851 (ISSN) 1521-3773 (eISSN)
Vol. 62 23 e202302874Subject Categories
Biochemistry and Molecular Biology
Materials Chemistry
Other Basic Medicine
DOI
10.1002/anie.202302874
PubMed
36995360