Aging of perovskite solar cells: a mini review

Aging of perovskite solar cells has been considered as a negative process toward degradation of efficiency. Recent studies, however, have reported phenomenon of self-enhancement or self-healing, where the power-conversion efficiencies were maintained or even enhanced over time without any treatment. Here, a comprehensive overview is made on the positive aging effect of perovskite materials and how it affects optoelectronic properties and charge transport layers. Possible origins of the aging are summarized and comparison between aging and degradation are described. Finally, strategies to accelerate the aging to induce improvements in device performance in a short time are discussed. Providing a new aspect of the aging process within perovskite solar cells.