Achieving ideal transistor characteristics in conjugated polymer semiconductors

作者：Xiao, Mingfei; Ren, Xinglong^*; Ji, Kangyu; Chung, Sein; Shi, Xiaoyu; Han, Jie; Yao, Zefan; Tao, Xudong; Zelewski, Szymon J.; Nikolka, Mark; Zhang, Youcheng; Zhang, Zhilong; Wang, Zichen; Jay, Nathan; Jacobs, Ian; Wu, Weijing; Yu, Han; Samad, Yarjan Abdul; Stranks, Samuel D.; Kang, Boseok; Cho, Kilwon; Xie, Jin; Yan, He^*; Chen, Shangshang^*; Sirringhaus, Henning^*

来源：Science Advances, 2023, 9(22): eadg8659.

DOI：10.1126/sciadv.adg8659

• HIGH-MOBILITY
• CHARGE-TRANSPORT
• HIGH-PERFORMANCE
• FIELD
• DISORDER
• SPECTROSCOPY
• AGGREGATION
• DEGRADATION
• EXTRACTION
• FILMS

Organic thin-film transistors (OTFTs) with ideal behavior are highly desired, because nonideal devices may over-estimate the intrinsic property and yield inferior performance in applications. In reality, most polymer OTFTs reported in the literature do not exhibit ideal characteristics. Supported by a structure-property relationship study of several low-disorder conjugated polymers, here, we present an empirical selection rule for polymer candidates for textbook-like OTFTs with high reliability factors (100% for ideal transistors). The successful can-didates should have low energetic disorder along their backbones and form thin films with spatially uniform energetic landscapes. We demonstrate that these requirements are satisfied in the semicrystalline polymer PffBT4T-2DT, which exhibits a reliability factor (similar to 100%) that is exceptionally high for polymer devices, rendering it an ideal candidate for OTFT applications. Our findings broaden the selection of polymer semiconductors with textbook-like OTFT characteristics and would shed light upon the molecular design criteria for next-generation polymer semiconductors.

• 单位
  南京大学; 北京大学