在有机光电器件中，共轭高分子与基底间的界面层的结构对器件性能至关重要。本项目拟利用QCM-D技术实时在线研究共轭高分子从溶液中在基底上的成膜过程，探索基底表面性质对共轭高分子界面层结构及其形成过程的影响，并结合光谱及X-射线衍射等方法系统研究界面层中共轭分子的排列、取向及相区结构。通过对界面层形成过程的实时跟踪，建立共轭高分子在基底表面的吸附、结晶机理，明确共轭高分子与基底间的界面相互作用；建立直接分析界面层结构的方法，揭示基底表面性质与共轭高分子界面层结构及器件性能的内在关系，以期为制备高性能有机光电器件提供指导。

In organic optoelectronic devices, the structure of the interfacial layer of the conjugated polymer thin film is critical to device performance. This project proposes to investigate in real time by QCM-D the formation process of the conjugated polymer film onto the substrate from solution, explore the influence of the substrate surface properties on the interfacial layer structure and its formation process, and in conjunction with spectroscopic and X-ray diffraction techniques study systematically the packing and orientation of the conjugated molecules and phase structure in the interfacial layer. By monitoring the formation process of the interfacial layer, we attempt to establish the deposition and crystallization mechanism of the conjugated polymer on the substrate surface, and clarify the interfacial interactions between the conjugated molecules and the substrate. We plan to develop a method to directly assess the interfacial structure, which will be correlated to the substrate surface properties and device performance. The findings are expected to provide guidance to the interface engineering in optoelectronic devices for improved performance.