敏化太阳电池新机制：能量转化“痕迹”追踪——光/电诱导界面和层间微质量响应研究

敏化太阳电池(DSC)内部光阳极/阴极处发生的多种相间光电过程是能量转化效率的关键因素，这些过程引起的界面微质量变化一直被忽视。基于此，项目提出追踪固液相间光电转化过程“痕迹”——界面微质量变化和电解液层内质量转移的新学术思想，拟从一个崭新的角度对DSC工作机理进行研究。项目首先通过巧妙的结构设计，构建了三种可以获得界面质量响应的特殊器件MDSC；其次，研究光阳极和光阴极两种类型MDSC，获得光阳极（阴极）界面处光/电诱导质量动态变化规律，定性和定量揭示光阳极（阴极）界面处原位质量变化和光电转化过程二者的相互作用机制；最后，研究对称型MDSC，明晰双极板间电解液层质量转移过程，形成完整的器件内部质量响应机制，实现从界面质量变化直接或者间接地推断、追踪、预测器件内部光电转化机制。项目的开展将丰富现有DSC光电转化理论，为筛选制备电池材料，探索器件老化机理，进一步提高DSC效率提供理论参考。

Multiple microscopic processes occur at the photoanode/cathode inside the sensitized solar cell (DSC), which is a key factor in determining efficiency. The change in interface mass caused by these microscopic processes has been neglected. Based on this, the project puts forward a new academic idea of "trace" of photoelectric transformation process between solid and liquid phase -- interface mass change and internal mass transfer in electrolyte layer. It is proposed to study the working mechanism of DSC from a new perspective. Firstly, through the ingenious structural design, the project constructed three special devices MDSC that can obtain the interface mass response. Secondly, study the photo-anode and photo-cathode MDSC to obtain the optical/electrical induced mass dynamics at the photoanode (cathode) interface. Qualitative and quantitative disclosure of the interaction mechanism between the in-situ mass change and the photoelectric conversion micro-process at the photoanode (cathode) interface. Finally, the symmetrical MDSC is studied to clarify the mass transfer process in the electrolyte layer between the bipolar plates and form a complete the internal mass response mechanism of the device. The photoelectric transformation mechanism of DSC can be further understood from the perspective of interface quality change. The development of the project will enrich the existing DSC photoelectric conversion theory, and provide a theoretical for preparing DSC materials, exploring the aging mechanism of the device, and further improving the DSC efficiency.