Bendable organic single crystals are promising candidates for flexible electronics owing to their superior charge-transport properties. However, large-area high-quality organic single crystals are rarely available on the polymer substrates generally used in flexible electronics. Here, a surface-assisted assembly strategy based on a polymer modification, poly(amic acid) (PAA), is developed to grow large-area organic singe crystals on polymer substrates using a simple drop-casting method. The unique surface properties of PAA that enable molecular solution superwetting and promote molecular ordered assembly produce an extraordinary self-driven “meniscus-guided coating” behavior, enabling the fabrication of millimeter-sized, highly aligned organic single crystals for a variety of organic semiconductors. Organic field-effect transistors based on a mode molecule of 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene demonstrate the highest (average) mobility of 18.6 cm² V⁻¹ s⁻¹ (15.9 cm² V⁻¹ s⁻¹), attractively low operating voltage of −3 V, and high flexible durability. The results shed light on the large-area fabrication of organic single crystals on polymer dielectrics toward high-performance and integrated plastic electronics.

中文翻译：

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具有高迁移率和耐用性的可弯曲有机单晶和晶体管阵列向柔性电子产品发展

可弯曲有机单晶因其优异的电荷传输特性而成为柔性电子产品的有希望的候选者。然而，在柔性电子产品中普遍使用的聚合物基板上却很少能获得大面积的高质量有机单晶。在这里，开发了一种基于聚合物改性聚（酰胺酸）（PAA）的表面辅助组装策略，以使用简单的滴铸法在聚合物基板上生长大面积有机单晶。PAA 独特的表面特性可实现分子溶液超润湿并促进分子有序组装，从而产生非凡的自驱动“弯月面引导涂层”行为，从而能够制造用于各种有机半导体的毫米级、高度对齐的有机单晶。² V ^-1 s ^-1 (15.9 cm ² V ^-1 s ^-1 )、-3 V的低工作电压和高柔性耐久性。该结果揭示了在聚合物电介质上大面积制造有机单晶以实现高性能和集成塑料电子产品。