The morphology of the active layer is vital for the device performance of organic electronics. However, most research is primarily focused on the active layer prepared from the spin coating method, which is not suitable for large area manufacturing. The inkjet printing technique has been widely studied in the field of organic electronics due to its advantages of scalability, patternability, and affordability. Nevertheless, morphological changes in the active layer during inkjet printing have received little attention. Herein, for the first time, the influence of inkjet printing parameters on the bulk heterojunction morphology and device performance of organic photovoltaics (OPVs) was systematically studied. The crystal sizes decreased as the inkjet printing speed or substrate temperature increased, which was vital for bimolecular recombination and carrier transport. Moreover, the π–π stacking distance decreased as the inkjet printing speed increased, which is beneficial to charge transport, resulting in improved device performance. However, an uneven film was formed when the substrate temperature increased, degrading the device performance. It is demonstrated that the control of inkjet printing parameters can effectively improve the morphology of active layer, paving guides for high-efficiency large-area production of OPVs and other organic electronics.

有源层的形态对有机电子器件的性能至关重要。然而，大多数研究主要集中在旋涂法制备的有源层上，不适用于大面积制造。喷墨印刷技术由于其可扩展性、可图案性和可负担性等优点，在有机电子领域得到了广泛的研究。然而，喷墨打印过程中活性层的形态变化很少受到关注。在此，首次系统地研究了喷墨印刷参数对有机光伏（OPV）体异质结形貌和器件性能的影响。晶体尺寸随着喷墨打印速度或基材温度的升高而减小，这对于双分子重组和载体运输至关重要。此外，该π – π堆积距离随着喷墨打印速度的增加而减小，有利于电荷传输，从而提高器件性能。然而，当基板温度升高时会形成不均匀的薄膜，从而降低器件性能。结果表明，喷墨印刷参数的控制可以有效改善活性层的形貌，为OPV和其他有机电子产品的高效大面积生产铺平道路。