Progress in research on the stability of organometal perovskite solar cells

Organometal lead halides based perovskite solar cells (PSC) are a recent discovery in photovoltaic technology that have demonstrated impressive power conversion efficiency achieved by cost-effective solution method (e.g. roll-to-roll production) from readily available raw materials. Nevertheless, the PSC devices have shown limited operating life-times due to degradation of the perovskite materials. Since long operational durability is essential for this new and promising PV technology to fulfil its mission to deliver clean, low cost renewable energy, this review presents the most recent research on understanding of the factors that may cause the degradation process in perovskite materials and PSC devices. Strategies that may improve the stability of PSCs through optimization of the device architectures and development of new materials are also discussed