电致变色
噻吩
共轭体系
材料科学
聚合物
接受者
二亚胺
光化学
光电子学
高分子化学
苝
化学
有机化学
分子
物理化学
复合材料
电极
物理
凝聚态物理
作者
Bryan Yat Kit Hui,Kang Le Osmund Chin,Jovan Jun Long Lim,Xiang Yun Debbie Soo,Xuehong Lu,Qiang Zhu,Xiaogang Liu,Jianwei Xu,Ming Hui Chua
标识
DOI:10.1002/asia.202400236
摘要
A series of conjugated polymers bearing thiophene‐based donors and pyromellitic diimide (PMDI) acceptor were prepared, and their electrochromic (EC) properties were studied via using fabricated thin‐film EC devices. It was observed that structurally regular alternating polymers with fewer (1 and 2) thiophene donors do not exhibit any EC properties while increasing the number of donors eventually led to the emergence of orange‐red‐to‐green colour switching. On this basis, two more random co‐polymers containing higher donor‐to‐acceptor ratios were synthesized to further improve EC switching properties. The two polymers, which bear a PMDI‐to‐thiophene ratio of ca. 1:7 and 1:8, revealed orange red‐to‐blue colour switching and generally improved optical contrasts and switching speeds in both the visible and near infra‐red (NIR) region. In addition, the subtle modulation of polymer colour and hue via variation of the number of thiophene donors was evident through colorimetric study. This work therefore demonstrates the potential and possibility of using the PMDI acceptor unit to construct EC‐active conjugated polymers, and considerations for future tuning of colour and switching performances.
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