Selenophene-containing semiconducting polymers for high-performance ambipolar thin film transistor application. (3rd May 2021)

• Record Type: Journal Article
• Authors: Guo, Yanjun; Xiao, Mingchao; Zhang, Xi; Duan, Jiayao; Cong, Shengyu; Jiang, Lang; Li, Zhengke; Yue, Wan
• Is Part Of: Polymer. Volume 223(2021)
• Publication Date: 2021-05-03
• Subjects: Selenophene -- Conjugated polymers -- Ambipolar; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; 547.7
• DOI: 10.1016/j.polymer.2021.123685
• Languages: English
• ISSNs: 0032-3861

Abstract

Abstract: The development of high-performance and well-balanced ambipolar conjugated polymers are critical to next generation optoelectronic devices. Herein, we report the synthesis and characterization of two APBDOPV polymers containing alternative bis-thiophene, and bis-selenophene as comonomers. The relationship between the structure and opto-electrical property, thin film morphology, molecular packing and solution processing thin film transistors have been investigated systemically. Our results showed that by increasing the size of the chalcogen atom, a stronger red-shifted absorption spectrum, higher IP and a reduced optical band gap are observed for selenophene-containing polymers. The enhanced EA and the planar backbone make both polymers as ambipolar charge transport behaviors under ambient conditions. Particularly, selenophene-containing polymer exhibits much higher and well-balanced hole/electron mobilities up to 0.11/0.15 cm 2 V −1 s −1 under ambient conditions with a BGTC device configuration. After further optimization of the TGBC configuration, higher hole/electron mobility of 0.19/0.76 cm 2 V −1 s −1 are achieved. Our results also demonstrate that introducing the chalcogen atom into the conjugated backbone is an effective approach to tune the property of the semiconducting polymers. Highlights: Two APBDOPV polymers containing alternative bis-thiophene and bis-selenophene were synthesized. High and well-balanced ambiploar charge carrier mobilities have been achieved. The relationship between the structure and property has been investigated systemically. Introducing the chalcogen atom can effectively tune the property of polymers.