Thermal treatment on photoelectric properties and stability of mixed-cation perovskite solar cells

• Main Authors: Hsin Lo, 羅忻
• Other Authors: 張博凱
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/233s36

碩士 === 國立中央大學 === 化學工程與材料工程學系 === 106 === In recent years, perovskite solar cells have flourished with significant advantages such as low cost and high efficiency. The major challenge for the commercial application is the stability. This study focuses on the difference of the perovskite solar cell with or without cesium-doped, with film analysis, power conversion efficiency and stability testing. we analysis crystallization, surface morphology and the electrical properties of the solar cells. It was found that the cells with cesium-doped effectively improve the film uniformity, efficiency and stability. Then we use spin coating method to fabricate the perovskite film, by adjusting the film formation time and temperature; we optimized the best temperature at 135 degree Celsius with annealing 60 minutes. We found that with the lower temperature and the shorter time annealing, the easier incomplete reaction to be discovered. However, higher temperature and the longer heating time, a large amount of PbI¬2 will deposit and destroy the crystal structure. This result applied to n-i-p type solar cells, the power conversion efficiency is up to 18%. After measuring its long-term stability, it was found stable that the efficiency maintains 70% about 300 hours in a low-humidity environment.