Tuning the crystal polymorphs of alkyl thienoacene via solution self-assembly toward air-stable and high-performance organic field-effect transistors.

He, Ping; Tu, Zeyi; Zhao, Guangyao; Zhen, Yonggang; Geng, Hua; Yi, Yuanping; Wang, Zongrui; Zhang, Hantang et al. · Adv Mater · 2015

basic_science · Level V

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Abstract

The first example for thienoacene derivatives with selective growth of different crystal polymorphs is simply achieved by solution-phase self-assembly. Compared with platelet-shaped α-phase crystals, organic field-effect transistors (OFETs) based on microribbon-shaped β-phase crystals show a hole mobility up to 18.9 cm(2) V(-1) s(-1), which is one of the highest values for p-type organic semiconductors measured under ambient conditions.