Modulating perovskite crystal growth process for high efficiency perovskite based solar cells

• Main Author: Tan, Mei Qin
• Other Authors: Lydia Helena Wong
• Format: Final Year Project
• Language: English
• Published: 2015
• Subjects: DRNTU::Engineering::Materials::Energy materials
• Online Access: http://hdl.handle.net/10356/62491
• Institution: Nanyang Technological University

Lead halide perovskites have recently been introduced as the light absorber in solar cells and this group of material offers excellent properties for applications in solar cells, offering high efficiencies in the recent years. This project aims to investigate the effects of several parameters on the perovskite crystal growth process in perovskite solar cells. Studies were done to investigate the effects of using alternative solvents in preparation of perovskite precursor solution. Amongst the different solvents studied, dimethylformamide is more suitable and offers the best device performance. The effect of moisture during dipping in sequential deposition was also studied and overall, moisture has a negative impact on device performance. In addition, heating of the methyl ammonium iodide (MAI) solution during the dipping step was also studied. High MAI solution temperature was found to result in a decline in device performance.