2D Single-Crystalline Molecular Semiconductors with Precise Layer Definition Achieved by Floating-Coffee-Ring-Driven Assembly

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• 作者：Qijing Wang ; Jun Qian ; Yun Li ; Yuhan Zhang ; Daowei He ; Sai Jiang ; Yu Wang ; Xinran Wang ; Lijia Pan ; Junzhuan Wang ; Xizhang Wang ; Zheng Hu ; Haiyan Nan ; Zhenhua Ni ; Youdou Zheng and Yi Shi
• 刊名：Advanced Functional Materials
• 出版年：2016
• 出版时间：May 17, 2016
• 年：2016
• 卷：26
• 期：19
• 页码：3191-3198
• 全文大小：2892K
• ISSN：1616-3028

文摘

2D organic materials with in-plane van der Waals forces among molecules have unique characteristics that ensure a brilliant future for multifunctional applications. Soluble organic semiconductors can be used to achieve low-cost and high-throughput manufacturing of electronic devices. However, achieving solution-processed 2D single-crystalline semiconductors with uniform morphology remains a substantial challenge. Here, the fabrication of 2D molecular single-crystal semiconductors with precise layer definition by using a floating-coffee-ring-driven assembly is presented. In particular, bilayer molecular films exhibit single-crystalline features with atomic smoothness and high film uniformity over a large area; field-effect transistors yield average and maximum carrier mobilities of 4.8 and 13.0 cm² V⁻¹ s⁻¹, respectively. This work demonstrates the strong potential of 2D molecular crystals for low-cost, large-area, and high-performance electronics.