Novel Air Stable Organic Radical Semiconductor of Dimers of Dithienothiophene, Single Crystals, and Field-Effect Transistors.

Zhang, Hantang; Dong, Huanli; Li, Yang; Jiang, Wei; Zhen, Yonggang; Jiang, Lang; Wang, Zhaohui; Chen, Wei et al. · Adv Mater · 2016

basic_science · Level V

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Abstract

Singly linked and vinyl-linked dimers of dithienothiophenes exhibit different electronic behaviors. Single crystals of the singly linked dimer show a high conductivity of 0.265 S cm(-1) , five orders of magnitude higher than that of the vinyl-linked dimer. The huge increase in the hole density of singly linked dimers results from the formation of radicals, which can be reversibly tuned by facile thermal de-doping.