Ummadisingu, A.; Seo, J.-Y.; Stojanovic, M.; Zakeeruddin, S. M.; Grätzel, M.; Hagfeldt, A.; Vlachopoulos, N.; Saliba, M. Additives, Hole Transporting Materials and Spectroscopic Methods to Characterize the Properties of Perovskite Films. Chimia 2017, 71 (11), 754. https://doi.org/10.2533/chimia.2017.754.