title: Diketopyrrolopyrrole-containing quinoidal small molecules for high-performance, air-stable, and solution-processable n-channel organic field-effect transistors.
abstract: 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 cm(2) V(-1) s(-1) with current on/current off (I(on)/I(off)) values of 10(6) for 1 by vapor evaporation, and 0.35 cm(2) V(-1) s(-1) with I(on)/I(off) values of 10(5)-10(6) 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.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Organic Solids Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.
authors.forename: Yali
authors.initials: Y
authors.lastname: Qiao
authors.forename: Yunlong
authors.initials: Y
authors.lastname: Guo
authors.forename: Chunmeng
authors.initials: C
authors.lastname: Yu
authors.forename: Fengjiao
authors.initials: F
authors.lastname: Zhang
authors.forename: Wei
authors.initials: W
authors.lastname: Xu
authors.forename: Yunqi
authors.initials: Y
authors.lastname: Liu
authors.forename: Daoben
authors.initials: D
authors.lastname: Zhu
mesh_terms: D000388:Air; D008958:Models, Molecular; D015394:Molecular Structure; D008970:Molecular Weight; D010316:Particle Size; D011758:Pyrroles / Q000737:chemistry*; D011809:Quinones / Q000138:chemical synthesis* / Q000737:chemistry; D012996:Solutions; D013499:Surface Properties; D014173:Transistors, Electronic
chemical_list: D011758:Pyrroles; D011809:Quinones; D012996:Solutions