Presentation Information
[24a-22C-6]Outdoor Power Generation Characteristics and Degradation Mechanism of Perovskite Solar Cells
〇Makoto Konagai1, Hayato Okawa1, Ryousuke Ishikawa1, Masatoshi Yanagida2, Yasuhiro Shirai2 (1.Tokyo City Univ., 2.NIMS)
Keywords:
perovskite solar cell,outdoor power generation characteristics,light-induced degradation
The perovskite solar cell used in the measurements was installed in a south-facing tilt angle of 35° and a two-axis tracking measurement system. In outdoor measurements from April to October 2023, the conversion efficiency deteriorated from 20% to 9%, mainly due to the deterioration of the fill factor. When the interface was observed using an optical microscope through the glass substrate of a sample that had deteriorated in an outdoor test, many striped and dotted patterns appeared. Next, when the sample was cut and a cross-sectional SEM observation was performed, a structure that appeared to originate from the interface was observed. These structures are thought to be high-resistance layers created by phase transitions in perovskites. Finally, the sample was kept indoors at around 65°C under solar simulator light irradiation, and changes in solar cell characteristics and structural changes observed with an optical microscope were observed. The results showed structural changes similar to those observed during outdoor exposure.