Ummadisingu, Amita, Ji-Youn Seo, Marko Stojanovic, Shaik M. Zakeeruddin, Michael Grätzel, Anders Hagfeldt, Nick Vlachopoulos, and Michael Saliba. “Additives, Hole Transporting Materials and Spectroscopic Methods to Characterize the Properties of Perovskite Films”. CHIMIA 71, no. 11 (November 29, 2017): 754. Accessed February 9, 2023. https://chimia.ch/chimia/article/view/2017_754.