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首页> 外文期刊>Advanced Functional Materials >Regulated Dewetting for Patterning Organic Single Crystals with Pure Crystallographic Orientation toward High Performance Field-Effect Transistors
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Regulated Dewetting for Patterning Organic Single Crystals with Pure Crystallographic Orientation toward High Performance Field-Effect Transistors

机译：规整的去湿，用于以纯晶体学方向朝向高性能场效应晶体管的有机单晶图案化

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摘要

Fabrication of high-quality organic single-crystalline semiconductors and their deterministic patterning are core opportunities as well as challenges for large-scale integration of functional devices with high efficiency and boosted performance. Previous approaches on solution patterning of organic semiconductors have achieved efficient and versatile control of the position, alignment, and size of organic structures. However, the poorly controllable dewetting dynamics of organic solution gives rise to low crystallinity and disordered crystallographic orientation of generated organic architectures that limit their device performance. Here, 1D organic single-crystal arrays with high crystallinity, strict crystallographic alignment, precise position, tunable, and homogeneous size are fabricated by exploiting an asymmetric-wettability topographical template. Periodically arranged micropillars with lyophobic sidewalls and lyophilic tops permit the generation of capillary bridges, which enable unidirectional dewetting of organic solution and ordered packing of molecules. The 1D arrays present pure (100) crystallographic orientation with pi-pi stacking of molecules in the optimal direction of carrier transport, leading to high carrier mobility of 8.7 cm(2) V-1 s(-1) in the field-effect transistor measurements. A facile pressure sensor based on the patterned belt arrays is fabricated, exhibiting high sensitivity and long-term stability.
机译：高质量有机单晶半导体的制造及其确定性的图案化是核心机遇，同时也是大规模集成功能器件，提高效率和提高性能的挑战。先前关于有机半导体的溶液图案化的方法已经实现了对有机结构的位置，对准和尺寸的有效且通用的控制。然而，有机溶液的不可控制的去湿动力学导致不良的结晶度和所生成的有机体系结构的无序晶体取向，从而限制了它们的器件性能。在这里，一维有机单晶阵列具有高结晶度，严格的晶体学排列，精确的位置，可调谐的尺寸和均一的尺寸，这是通过利用不对称润湿性的形貌模板制作的。具有疏液性侧壁和亲液性顶部的周期性排列的微柱允许生成毛细管桥，从而能够对有机溶液进行单向去湿和分子的有序堆积。 1D阵列呈现纯（100）晶体学取向，分子在最佳载流子传输方向上进行pi-pi堆叠，导致场效应晶体管中的载流子迁移率高达8.7 cm（2）V-1 s（-1）测量。制造了一种基于带状图案的带状的压力传感器，具有很高的灵敏度和长期稳定性。

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