Polymer semiconductors are ubiquitous in plastic electronics. Their morphology and structure control electronic and optical properties, hence, the performances of electronic devices such as organic field effect transistors, organic light emitting diodes, organic photovoltaic cells and thermoelectric generators. The molecular complexity of emerging families of polymers such as low bandgap polymers translates into a corresponding structural diversity that needs to be investigated to establish structure–property correlations and ultimately to design more effective materials and devices. Analysis of this structural manifold is challenging and needs appropriate methods of growth and crystallization as well as appropriate structural investigation tools. This contribution is a short review of the recent progress made using electron diffraction to uncover the structural signatures of several representative polymer semiconductors that are widely used in plastic electronics, especially in organic photovoltaic devices.

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洞察半结晶聚合物半导体的结构复杂性：电子衍射贡献

聚合物半导体在塑料电子产品中无处不在。它们的形态和结构控制着电子和光学特性，因此控制着电子器件的性能，例如有机场效应晶体管，有机发光二极管，有机光伏电池和热电发电机。诸如低带隙聚合物之类的新兴聚合物家族的分子复杂性转化为相应的结构多样性，需要对其进行研究以建立结构与性质的相关性，并最终设计出更有效的材料和装置。这种结构流形的分析具有挑战性，需要适当的生长和结晶方法以及适当的结构研究工具。