基于非富勒烯材料的有机薄膜光伏器件近年来备受关注。与旋涂加工相比，印刷加工方式更适合商业化的推广使用。同时，二者在物理本质上截然不同，特别是在形貌控制及其对应的光电转化过程。此外，对于活性层形貌细节，如材料结晶、相分离程度、界面取向等仍没有形成固定的规律，亟待深入的研究和探讨。本项目以有机光伏器件和形貌为研究对象，结合印刷技术，探究加工工艺对光吸收层形貌的影响。研究拟采用原子力显微镜（AFM）、近场光学显微镜（SNOM）、透射电镜（TEM）、掠入射X射线散射（GIXD）和共振软X射线散射（RSoXS）等手段深入研究薄膜形貌细节。利用原位X射线散射（in situ GIXD）方法探究共混膜非平衡态形貌的形成过程。通过对器件物理的表征理解相关物理过程，并结合形貌框架，构建光吸收层薄膜微纳结构与器件性能的构效关系，指导高效薄膜光伏器件的印刷制备，为后续有机光伏器件的大规模连续制备奠定基础。

Organic thin film photovoltaic devices based on non-fullerene acceptor have received much attention in recent years. Compared with spin-coating, printing fabrication is more suitable for commercial use. At the same time, these two methods are completely different in physical nature, especially in the morphology control and its photoelectric conversion process. In addition, for the morphology of active layer, such as material crystallization, phase separation and interface orientation are still no law of formation, which needs further research and discussion. This project takes the organic photovoltaic device and film morphology as the research object. Utilize the printing fabrication to explore the influence of the processing technology on the morphology of the active layer. This study will use atomic force microscopy, near-field optical microscopy, transmission electron microscopy, grazing incidence X-ray scattering and resonant soft X-ray scattering to investigate the morphology of the film. In-situ X-ray scattering method was used to consider the formation process of non-equilibrium morphology of blend films. By understanding the physical processes of the devices from physical characterization, and combining the morphological framework, the structure-effect relationship of the micro-nano structure of the films and the device performance will be constructed. To guide the printing fabrication of high-efficiency thin film photovoltaic devices and lay the foundation for large-scale continuous fabrication of organic photovoltaic devices.