Light-responsive self-strained organic semiconductor for large flexible OFET sensing array

Mingliang Li, Jing Zheng, Xiaoge Wang, Runze Yu, Yunteng Wang, Yi Qiu, Xiang Cheng, Guozhi Wang, Gang Chen, Kefeng Xie () and Jinyao Tang ()
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Mingliang Li: The University of Hong Kong
Jing Zheng: The University of Hong Kong
Xiaoge Wang: Peking University
Runze Yu: ShanghaiTech University
Yunteng Wang: Institut für Geotechnik, Universität für Bodenkultur Wien, Feistmantelstraße 4
Yi Qiu: Peking University
Xiang Cheng: The University of Hong Kong
Guozhi Wang: GRIMAT Engineering Institute Co., Ltd
Gang Chen: ShanghaiTech University
Kefeng Xie: Lanzhou Jiaotong University
Jinyao Tang: The University of Hong Kong

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract With the wide application of organic semiconductors (OSCs), researchers are now grappling with a new challenge: design and synthesize OSCs materials with specific functions to satisfy the requirements of high-performance semiconductor devices. Strain engineering is an effective method to improve the semiconductor material’s carrier mobility, which is fundamentally originated from the rearrangement of the atomic packing model of materials under mechanic stress. Here, we design and synthesize a new OSC material named AZO-BTBT-8 based on high-mobility benzo[b]benzo[4,5]thieno[2,3-d]thiophene (BTBT) as the semiconductor backbone. Octane is employed to increase molecular flexibility and solubility, and azobenzene at the other end of the BTBT backbone provides photoisomerization properties and structural balance. Notably, the AZO-BTBT-8 photoisomerization leads to lattice strain in thin-film devices, where exceptional device performance enhancement is realized. On this basis, a large-scale flexible organic field-effect transistor (OFET) device array is fabricated and realizes high-resolution UV imaging with reversible light response.

Date: 2022
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DOI: 10.1038/s41467-022-32647-9

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