[16a-C41-1~6] New direction of perovskite solar cells

9:15 AM - 9:45 AM JST(12:15 AM - 12:45 AM UTC)English Presentation

[16a-C41-2] Challenges and Perspectives of Perovskite Solar Cells - Lessons from 50 years of thin film solar cell development

〇Makoto Konagai¹ (1.Tokyo City Univ.)

Keywords:

perovskite solar cell,perovskite/Si tandem,degradation

Flexible amorphous Si solar cells using polyimide film substrates are already a mature technology. We have developed a perovskite solar cell with through-hole current collector electrodes on a polyimide film substrate and have already achieved a conversion efficiency of about 12%. In this study, we are conducting development of perovskite/Si tandem solar cells using bendable Si wafers. To date, we have achieved a conversion efficiency approaching 27% . We have been conducting outdoor power generation characteristics of perovskite solar cells prepared at NIMS since 2022.The cells deteriorated significantly, especially in the summer when the cell temperature rose. The deterioration of the fill factor was noticeable. To clarify the cause of the degradation, cross-sectional SEM observation was performed, and a high-resistance layer due to phase transition was observed. The phase transition was also observed in high-temperature light irradiation experiments indoors.