Synthesis, characterization, and field-effect properties of (E)-2-(2-(thiophen-2-yl)vinyl)thiophen-based donor–acceptor copolymers. (26th June 2015)

• Record Type: Journal Article
• Authors: Wang, Liping; Xie, Xiaodong; Shi, Shaowei; Shi, Keli; Mao, Zupan; Zhang, Weifeng; Wang, Haiqiao; Yu, Gui
• Is Part Of: Polymer. Volume 68(2015)
• Page Start: 302
• Page End: 307
• Publication Date: 2015-06-26
• Subjects: Conjugated copolymers -- Field-effect transistor -- Mobility; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; 547.7
• DOI: 10.1016/j.polymer.2015.05.033
• Languages: English
• ISSNs: 0032-3861

Abstract

Abstract: Two donor–acceptor copolymers, PTVTBT and PTVTBO, using the highly π -extended ( E )-2-(2-(thiophen-2-yl)vinyl)thiophen as an electron-rich unit and benzodiathiazole or benzoxadiazole as an electron-deficient one, were designed and synthesized via a Pd-catalyzed Stille-coupling method. The copolymers possess high thermal stability, broad absorption, low band gap, and good film-forming ability. Meanwhile the two polymers exhibit excellent hole transport properties when used as the active layer in polymer field-effect transistor devices. The highest hole mobility can reach to 0.25 and 0.50 cm 2 V −1 s −1 for the PTVTBT and PTVTBO thin films, respectively. This work demonstrates that PTVTBT and PTVTBO would be promising semiconductors for developing cost-effective and large-scale production of flexible organic electronics. Graphical abstract: Highlights: ( E )-2-(2-(thiophen-2-yl)vinyl)thiophen-based donor–acceptor copolymers were synthesized. Both polymers exhibit good solubility and solution processability. Thin-film transistors show hole transporting properties. The highest hole mobility reaches to 0.5 cm 2 V −1 s −1 under ambient conditions. The annealing treatment has a large effect on the device performance.