Recent Advances in Thermo- and Photostabilities of Organic Solar Cells: Material Design and Morphology Control

As an emerging photovoltaic technology, organic solar cells (OSCs) have attracted extensive attention in recent years due to the advantages of light weight, flexibility, semi-transparency, and potential for roll-to-roll device fabrication. Currently, state-of-the-art OSCs have achieved over 20% power conversion efficiency (PCE), indicating their bright application prospects. Thus, stability becomes a critical issue for the commercialization of OSCs. In practical environments, light and heat are the main factors affecting the stability of OSCs. In this review, we first summarize the key degradation routes induced by thermal and light stresses. Then, recent strategies to enhance thermo- and photostability of OSCs are reviewed, focusing on material design and morphology control. Finally, some suggestions are provided for the development of next-generation OSCs with high efficiency and excellent stability.