Application of Metal-Organic Frameworks in Dye-Sensitized Solar Cells
- 2016年第22卷 
为了获得高效率的染料敏化太阳能电池，其光阳极应该具有大的比表面积，以吸附足量的染料，获得很强的光捕获能力.从这个角度而言，将具有很大比表面积的金属有机框架材料引入到染料敏化太阳能电池的体系中，无疑是一种有益的探索.本文简介了金属有机框架材料在光伏领域的应用，并重点介绍了我们课题组在利用金属有机框架材料方面进行的一些探索，包括光阳极薄膜的处理、利用金属有机框架材料作为前驱体制备光阳极材料和光散射层.最后，本文对金属有机框架材料应用于染料敏化太阳能电池中的局限性及前景做了简要的展望.To assemble dye-sensitized solar cells (DSSCs) with high efficiencies, their photoanodes should have large specific surface area to establish a large adsorption amount of dyes and good light-harvesting ability. From this point of view, it will be an interesting topic to explore the application of metal-organic frameworks (MOFs) in the field of DSSCs due to their huge specific surface area. This paper introduces the application of MOFs in photovoltaic devices briefly, and then summaries our approaches in using MOFs in the study of DSSCs, including the pre-treatment and the post-treatment of photoanode, the preparation of photoanode materials and the light scattering layer with MOFs as precursors. Characterization techniques such as Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Incident Photo-to-electron Conversion Efficiency (IPCE), Electrochemical Impedance Spectroscopy (EIS) and N2 adsorption-desorption isotherms were used to investigate the roles of MOFs in such devices. The introduction of MOFs was found to increase the dye adsorption greatly and inhibit the charge recombination. The decomposition of MOFs led to the formation of hierarchical TiO2 that could be used as photoanode materials directly, and it also lead to the fabrication of hierarchical ZnO with scattering ability. Finally, the limitation and prospect of MOFs in the area of DSSCs are briefly discussed.