[D-8] Optoelectronics and Thermoelectronic Devices

[D-8-02] Improved Operational Stability of Perovskite Solar Cells at High Temperature

〇Yuki Fujita¹, Ganbaatar Tumen Ulzii², Toshinori Matsushima¹, Chihaya Adachi¹ (1. Univ. of Kyushu (Japan), 2. Univ. of Cambridge (UK))

Presentation style: Online

https://doi.org/10.7567/SSDM.2022.D-8-02

Metal halide hybrid perovskites are promising be-cause of the efficient harvesting of solar energy into electricity. However, the degradation of perovskite solar cells (PSCs), especially at high temperature, is still problematic for future commercialization. In this study, we show that volatilization of 4-tert-butylpyridine (4-tBP) from an organic hole transport layer is the main degradation mechanism of PSCs at high temperature. We demonstrate that this 4-tBP volatilization can be suppressed by covering PSCs with a fluoro-polymer CYTOP layer, greatly improving the high-temperature stability of PSCs.