期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 26, 期 16, 页码 3578-3585出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201904901
关键词
charge transfer; donor-acceptor systems; cocrystallization; stacking interactions; phototransistors
资金
- AcRF, Singapore [RG 111/17, RG 2/17, RG 114/16, RG 113/18, MOE 2017-T2-1-021, MOE 2018-T2-1-070]
- National Natural Science Foundation of China [NSFC 21975126]
- Natural Science Foundation of Jiangsu Province [BK20171470]
Although cocrystallization has provided a promising platform to develop new organic optoelectronic materials, it is still a big challenge to purposely design and achieve specific optoelectronic properties. Herein, a series of mixed-stacking cocrystals (TMFA, TMCA, and TMTQ) were designed and synthesized, and the regulatory effects of the acceptors on the co-assembly behavior, charge-transfer nature, energy-level structures, and optoelectronic characteristics were systematically investigated. The results demonstrate that it is feasible to achieve effective charge-transport tuning and photoresponse switching by carefully regulating the intermolecular charge transfer and energy orbitals. The inherent mechanisms underlying the change in these optoelectronic behaviors were analyzed in depth and elucidated to provide clear guidelines for future development of new optoelectronic materials. In addition, due to the excellent photoresponsive characteristics of TMCA, TMCA-based phototransistors were investigated with varying light wavelength and optical power, and TMCA shows the best performance among all reported cocrystals under UV illumination.
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