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Solution-processed self-assemble engineering PDI derivative polymorphisms with optoelectrical property tuning in organic field-effect transistors

par Liu, Xitong;Xu, Haixiao;Zhou, Yecheng;Yang, Canglei;Liu, Guangfeng ;Luo, Lixing;Wang, Wei;Ma, Yudong;Jin, Jianqun;Zhang, Jing;Huang, Wei
Référence Organic electronics, 83, 105777
Publication Publié, 2020-08-01

Article révisé par les pairs

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Résumé :

The crystal polymorphism study leads to an explosion of science research, related to many fields, such as organic semiconductors, pharmaceuticals, pigments, food, and explosives. Two different crystal phases of a perylene diimide derivative (4FPEPTC) have been prepared via a simple and efficient solution method. Via changing the concentration of the solution, we observed the polymorphisms clearly, wire-shape (α phase) and ribbon-like (β phase) crystals differed in the stacking mode and short-contacts. Moreover, the as-prepared n-channel microcrystal-based devices demonstrated distinct electron mobilities that of α phase architecture higher than β phase structure and obvious photoresponse discrepancy. Theoretical calculations further confirmed this phenomena, which help us to understand the structure-property relationship in this crystal polymorph. Our study indicates that the investigation of polymorphisms could be considered as a very useful method to realize functional property modulation and benefits the development of organic (opto)electronics.