Diaza-substituted conjugated polymers based on naphthalene diimide for n-type field-effect transistors. (October 2021)

• Record Type: Journal Article
• Authors: Zhang, Guobing; Yu, Hao; Sun, Mingxiang; Tang, Longxiang; Qiu, Longzhen
• Is Part Of: Dyes and pigments. Volume 194(2021)
• Publication Date: 2021-10
• Subjects: Organic thin-film transistors -- Diaza-substituted conjugated polymers -- n-type; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2021.109660
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: Two conjugated polymers (PNDI-TPzT and PNDI-TPmT ) based on naphthalene diimide as acceptor and diaza-substituted thiophene-phenyl-thiophene with para- and meta-position as co-units were designed and synthesized. The reported polymer (PNDI-TPaT ) with ortho-substitution was also used for comparison. The different aza-substitution exerted effect on the absorption, energy levels, microstructure, and field-effect transistor performances. All the diaza-substituted conjugated polymers exhibited n -type transport characteristics under vacuum conditions. PNDI-TPmT with meta-substitution which had ordered structure and π−π stacking exhibited the highest field-effect transistor performances with the mobility of about 0.07 cm 2 V −1 s −1 . Highlights: Diaza-substituted polymers and the position effect were firstly investigated. Diaza-substitution exerted effect on the microstructure and device performance. Three polymers exhibited n -type transport characteristics.