Perovskite solar cells (PSCs) have witnessed significant achievements in terms of power conversion efficiency, and the focus has now shifted toward outdoor operational stability. It has been well established that PSCs exhibit diurnal, reversible performance dynamics outdoors, where they are exposed to different daytime and nighttime temperatures along with varying sun irradiance. This brief perspective discusses the role of temperature in device performance degradation. While temperatures during illumination periods are known to accelerate photodegradation, we stress the importance of nighttime temperatures in affecting PSC degradation and recovery, hence the overall power yield. This adds to the significant temperature effects on photostability and hints that both temperature effects should be understood toward a full prediction of the long-term performance of perovskite-based devices.
Gupta et al. (Sun,) studied this question.