Tian Jianwu, Liu Zitong, Wu Changchun, Jiang Wenlin, Chen Liangliang, Shi Dandan, Zhang Xisha, Zhang Guanxin, Zhang Deqing
Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, CAS Center of Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Adv Mater. 2021 Feb;33(8):e2005613. doi: 10.1002/adma.202005613. Epub 2021 Jan 14.
A new design strategy for photoresponsive semiconducting polymer with tri-stable semiconducting states is reported by simultaneous incorporation of tetra-ortho-methoxy-substituted azobenzene (mAzo) and arylazopyrazole (pAzo) in the side chains. The trans-to-cis transformations for mAzo and pAzo groups can sequentially occur within the polymer thin film after sequential 560 and 365 nm light irradiation. Remarkably, the trans-cis isomerization of mAzo and pAzo groups can modulate the thin film crystallinity. Accordingly, the performances of the resulting field-effect transistors (FETs) can be reversibly modulated, leading to tri-stable semiconducting states after sequential 560, 365, and 470 nm light irradiation. Therefore, the device performance can be logically controlled by light irradiation at three different wavelengths. In addition, with light irradiation and device current as the input and output signals, the three-value logic gate by using single FET device can be successfully mimicked.
通过在侧链中同时引入四邻甲氧基取代的偶氮苯（mAzo）和芳基偶氮吡唑（pAzo），报道了一种具有三稳态半导体状态的光响应半导体聚合物的新设计策略。在依次进行560和365nm光照射后，聚合物薄膜内的mAzo和pAzo基团的反式至顺式转变可依次发生。值得注意的是，mAzo和pAzo基团的反式-顺式异构化可调节薄膜的结晶度。因此，所得场效应晶体管（FET）的性能可被可逆地调节，在依次进行560、365和470nm光照射后导致三稳态半导体状态。因此，器件性能可通过在三种不同波长下的光照射进行逻辑控制。此外，以光照射和器件电流作为输入和输出信号，利用单个FET器件成功模拟了三值逻辑门。
