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Qiao, Yali; Guo, Yunlong; Yu, Chunmeng; Zhang, Fengjiao; Xu, Wei; Liu, Yunqi; Zhu, Daoben
Journal of the American Chemical Society, 03/2012, Letnik: 134, Številka: 9Journal Article
We report the synthesis, characterization, and application of a novel series of diketopyrrolopyrrole (DPP)-containing quinoidal small molecules as highly efficient n-type organic semiconductors in thin film transistors (TFTs). The first two representatives of these species exhibit maximum electron mobility up to 0.55 cm2 V–1 s–1 with current on/current off (I on/I off) values of 106 for 1 by vapor evaporation, and 0.35 cm2 V–1 s–1 with I on/I off values of 105–106 for 2 by solution process in air, which is the first demonstration of DPP-based small molecules offering only electron transport characteristics in TFT devices. The results indicate that incorporation of a DPP moiety to construct quinoidal architecture is an effective approach to enhance the charge-transport capability.
