| Summary: | 碩士 === 中原大學 === 化學研究所 === 102 === This study is based on perovskite material - CH3NH3PbI3 as a light absorbing material. In a traditional dye-sensitized solar cell, the organic dye is often used as a photosensitizer. In the view of the organic dyes are high priced and difficult to be synthesized, the present experiments synthesized inorganic light absorber to instead of the traditional organic dye photosensitizers.
In the first part of the study, we introduce how to prepare perovskite structure material, and confirm using X-ray diffraction spectroscopy and Thermogravimetric analysis. It did not require high temperature and energy-consuming equipment to synthesize the perovskite materials for the use in solar cells.
In the second part of the study, we have employed the perovskite materials in the solar cells and measured its photovoltaic properties. We used solution deposition method and sequential deposition method to deposit the perovskite structure material on the TiO2 film to prepare the solar cell with the structure of traditional DSSC and liquid electrolyte. The results of this experiment achieved =4.93%, more than 80% of the photoelectric conversion efficiency of the traditional dye-sensitized solar cell efficiency (=5.86%).
In the third part of the study, since the perovskite materials are susceptible to the moisture and decompose easily in the electrolyte solvent, leading to a rapid decline of the performance. Preparation of all-solid solar cells was done to replace the traditional dye-sensitized solar cell to avoid the disadvantages of electrolyte. Hole-conducting materials (HTMs) such as spiro-MeOTAD in perovskite solar cells are demonstrated to optimize the efficiency.
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