Strategies for improving the stability of polymer solar cells

Organic solar cells (OSCs) have received much attention due to its low cost and lightweight. Many researchers have been down to improve its efficiency, which has recently increased to about 20%. However, the stability of OSCs is still hard to control since different organic materials present various properties. Therefore, the development of stability is one of the most significant directions to promote the commercialization of OSCs. In this paper, recent research on the stability of OSCs is reviewed to introduce the mechanism of degradation. Based on the cause of degradation, the strategies to improve the stability are concluded from the perspective of humidity, temperature and light.