Insights into the Control of Optoelectronic Properties in Mixed-Stacking Charge-Transfer Complexes
Insights into the Control of Optoelectronic Properties in Mixed-Stacking Charge-Transfer Complexes
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DOI：
10.1002/chem.201904901
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发表时间：
2020-02-25
影响因子：
4.3
通讯作者：
Zhang, Qichun
中科院分区：
文献类型：
--
作者：
Wang, Zongrui;Yu, Fei;Zhang, Qichun
虽然共结晶为开发新型有机光电材料提供了一个很有前景的平台，但有目的地设计和实现特定的光电性能仍然是一个很大的挑战。本文设计并合成了TMFA、TMCA和TMTQ混合堆叠共晶，并系统研究了受体对共组装行为、电荷转移性质、能级结构和光电特性的调控作用。结果表明，通过精细调节分子间电荷转移和能量轨道，实现有效的电荷输运调谐和光响应开关是可行的。深入分析并阐明了这些光电行为变化的内在机制，为未来新型光电材料的开发提供明确的指导。此外，由于TMCA具有优异的光响应特性，在不同的光波长和光功率下对基于TMCA的光晶体管进行了研究，结果表明TMCA在紫外光照射下表现出最好的性能。
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.