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Title: Bandgap Engineering of an Aryl-Fused Tetrathianaphthalene for Visible-Blind Organic Field-Effect Transistors
Authors: Zhang, Lijuan
Tian, Xinzi
Sun, Yantao
Yao, Jiarong
Yang, Shuyuan
Liu, Zheyuan
Ge, Zhen
Zhang, Hongtao
Sun, Yan
Shao, Xiangfeng
Li, Rongjin
Hu, Wenping 
Keywords: bandgap engineering
molecular configuration
organic field-effect transistors
organic semiconductors
Issue Date: 28-May-2021
Publisher: Frontiers Media S.A.
Citation: Zhang, Lijuan, Tian, Xinzi, Sun, Yantao, Yao, Jiarong, Yang, Shuyuan, Liu, Zheyuan, Ge, Zhen, Zhang, Hongtao, Sun, Yan, Shao, Xiangfeng, Li, Rongjin, Hu, Wenping (2021-05-28). Bandgap Engineering of an Aryl-Fused Tetrathianaphthalene for Visible-Blind Organic Field-Effect Transistors. Frontiers in Chemistry 9 : 698246. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: Stability problem of organic semiconductors (OSCs) because of photoabsorption has become a major barrier to large scale applications in organic field-effect transistors (OFETs). It is imperative to design OSCs which are insensitive to visible and near-infrared (VNIR) light to obtain both environmental and operational stability. Herein, taking a 2,3,8,9-tetramethoxy [1,4]benzodithiino[2,3-b][1,4]benzodithiine (TTN2) as an example, we show that controlling molecular configuration is an effective strategy to tune the bandgaps of OSCs for visible-blind OFETs. TTN2 adopts an armchair-like configuration, which is different from the prevailing planar structure of common OSCs. Because of the large bandgap, TTN2 exhibits no photoabsorption in the VNIR region and OFETs based on TTN2 show high environmental stability. The devices worked well after being stored in ambient air, (i.e. in the presence of oxygen and water) and light for over two years. Moreover, the OFETs show no observable response to light irradiation from 405–1,020 nm, which is also favorable for high operational stability. © Copyright © 2021 Zhang, Tian, Sun, Yao, Yang, Liu, Ge, Zhang, Sun, Shao, Li and Hu.
Source Title: Frontiers in Chemistry
ISSN: 2296-2646
DOI: 10.3389/fchem.2021.698246
Rights: Attribution 4.0 International
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