Yang Yizhou, Liu Zitong, Chen Jianmei, Cai Zhengxu, Wang Zhijie, Chen Wei, Zhang Guanxin, Zhang Xisha, Chi Lifeng, Zhang Deqing
Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids CAS Center of Excellence in Molecular Science Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China.
School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 P. R. China.
Adv Sci (Weinh). 2018 Oct 9;5(11):1801497. doi: 10.1002/advs.201801497. eCollection 2018 Nov.
Development of facile and economic approaches for assembling organic semiconductors into more ordered structures toward high charge mobilities is highly demanding for the fabrication of organic circuits. Here a simple and facile approach is reported to prepare conjugated polymer thin films with improved crystallinities and charge mobilities by self-assembling semiconducting polymers on water. The formation of polymer thin films with more ordered structures is attributed to coffee ring effect induced by solvent-evaporation on water, and the hydrophobic nature of conjugated polymers that forces the polymer chains to pack densely and orderly on water surface. This approach is applicable to typical semiconducting polymers, and charge mobilities of their thin films are boosted remarkably. Finally, this new method can be utilized to easily fabricate the array of field-effect transistors with high charge mobilities in an economic way.
开发简便且经济的方法，将有机半导体组装成更有序的结构以实现高电荷迁移率，这对有机电路的制造来说是非常必要的。本文报道了一种简单易行的方法，通过在水上自组装半导体聚合物来制备具有改善的结晶度和电荷迁移率的共轭聚合物薄膜。具有更有序结构的聚合物薄膜的形成归因于水表面溶剂蒸发引起的咖啡环效应，以及共轭聚合物的疏水性，这种疏水性迫使聚合物链在水表面密集且有序地堆积。该方法适用于典型的半导体聚合物，其薄膜的电荷迁移率得到显著提高。最后，这种新方法可用于以经济的方式轻松制造具有高电荷迁移率的场效应晶体管阵列。
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