2D organic semiconductor crystals are emerging as a fascinating platform with regard to their applications in organic field‐effect transistors (OFETs), attributed to their enhanced charge transport efficiency and their new optoelectronic functions, based on their unique morphological features. Advances in material processing techniques have not only enabled easy fabrication of few‐monolayered 2D nanostructures but also facilitated exploration of the interesting properties induced by characteristic 2D morphologies. However, to date, only a limited number of representative organic semiconductors have been utilized in organic 2D optoelectronics. Therefore, in order to further spur this research, an intuitive crystal engineering principle for realizing organic 2D crystals is required. In this regard, here, not only the important implications of applying 2D structures to OFET devices are discussed but also a crystal engineering protocol is provided that first predicts molecular arrangements depending on the molecular factors, which is followed by realizing 2D supramolecular synthon networks for different molecular packing motifs. It is expected that 2D organic semiconductor crystals developed by this approach will pave a promising way toward next‐generation organic 2D optoelectronics.

中文翻译：

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有机2D光电晶体：电荷传输，新兴功能及其设计前景

二维有机半导体晶体在有机场效应晶体管（OFET）中的应用正成为一个引人入胜的平台，这归因于其独特的形态学特征，增强了电荷传输效率并具有新的光电功能。材料处理技术的进步不仅使几层单层2D纳米结构的制造变得容易，而且还促进了由特征2D形态引起的有趣特性的探索。然而，迄今为止，在有机2D光电中仅利用了有限数量的代表性有机半导体。因此，为了进一步推动这项研究，需要一种直观的晶体工程原理来实现有机2D晶体。在这方面，不仅讨论了将2D结构应用于OFET器件的重要意义，而且提供了一种晶体工程方案，该方案首先根据分子因素预测分子排列，然后实现针对不同分子堆积基序的2D超分子合成子网络。预计通过这种方法开发的2D有机半导体晶体将为下一代有机2D光电子学铺平一条有希望的道路。