Saliba, M.; Correa-Baena, J.-P.; Graetzel, M.; Hagfeldt, A.; Abate, A.: Perovskite solar cells from the atomic to the film level. Angewandte Chemie - International Edition 57 (2018), p. 2554-2569

Organic-inorganic perovskites have made tremendous progress in recent years due to exceptional material properties such as high panchromatic absorption, charge carrier diffusion lengths and a sharp optical band edge. The combination of high-quality semiconductor with low-cost deposition techniques seems to be a match made in heaven creating great excitement and anticipation far beyond the academic ivory tower. This is particularly true for perovskite solar cells (PSCs) that have shown unprecedented gains in efficiency and stability over a time span of just 5 years. Now there are serious efforts for commercialisation with the hope that PSCs can make a major impact in generating inexpensive, sustainable solar electricity. In this review, we will focus on materials and devices from the atomic to the thin film level to highlight the remaining challenges and to anticipate the future developments of PSCs.