Li Mingliang, Zheng Jing, Wang Xiaoge, Yu Runze, Wang Yunteng, Qiu Yi, Cheng Xiang, Wang Guozhi, Chen Gang, Xie Kefeng, Tang Jinyao
Department of Chemistry, The University of Hong Kong, Hong Kong, 999077, China.
Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China.
Nat Commun. 2022 Aug 20;13(1):4912. doi: 10.1038/s41467-022-32647-9.
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.
随着有机半导体（OSCs）的广泛应用，研究人员现在正面临着一个新的挑战：设计和合成具有特定功能的有机半导体材料，以满足高性能半导体器件的要求。应变工程是提高半导体材料载流子迁移率的有效方法，其根本源于材料在机械应力下原子堆积模型的重新排列。在此，我们基于高迁移率的苯并[b]苯并[4,5]噻吩并[2,3-d]噻吩（BTBT）作为半导体骨架，设计并合成了一种名为AZO-BTBT-8的新型有机半导体材料。辛烷用于增加分子柔韧性和溶解性，BTBT骨架另一端的偶氮苯提供光异构化特性和结构平衡。值得注意的是，AZO-BTBT-8的光异构化导致薄膜器件中的晶格应变，从而实现了卓越的器件性能提升。在此基础上，制备了大规模柔性有机场效应晶体管（OFET）器件阵列，并实现了具有可逆光响应的高分辨率紫外成像。
