| Summary: | 碩士 === 國立中央大學 === 能源工程研究所 === 105 === In this study, we have successfully synthesized the Ca/Ti compounds as the mesoporous layer for perovskite solar cells. Besides, we further synthesis Ca/Ti compounds with different Ca/Ti ratio to obtain the energy-level matching between the compact layer, the active layer and the mesoporous layer of the perovskite solar cell.
We also develop a low-temperature process to fabricate perovskite solar cells without sintering at a temperature of 500 ℃ to achieve the purpose of energy conservation. Eventually, the whole fabrication process of the perovskite solar cells can be done at a heating temperature lower than 180 ℃ which can realize the application of the flexible solar cell in the future.
Moreover, as the band gap of the Ca/Ti compounds is 3.47 eV, the short-circuit current density (Jsc) of the perovskite solar cell will improved due to the reduction of the electrons and holes recombination. In comparison with standard perovskite solar cells, the perovskite solar cells with the optimized Ca/Ti compounds as the mesoporous layer can effectively improve the Jsc from 18.85 to 22.33mA/cm2, and enhance the power conversion efficiency (PCE) from 14.70 % to 17.60 %.
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