Guanidinium-based Multi Cation Halide Perovskite for Solar Cell Applications

Due to the cost effectiveness, high power conversion efficiency, and simple fabrication process, the perovskite solar cells are rising as the most promising candidate among the new photovoltaic technologies. An organic-inorganic hybrid photo absorber of general formular ABX3 (where A = Cs+, Rb+, methylammonium (MA) (CH3NH3+), formamidinium (FA) (CH(NH2)2+), guanidinium (GA) (CH6N3+), B = Pb2+, Sn2+, X = I-, Br-) is counting as the key component in a perovskite solar cell device. However, inhomogeneity in the polycrystalline films and the anomalous photo current density-voltage responses retard the commercialization of perovskite solar cells. In this book, the possible compositional variations of the perovskite absorber by addition of secondary cations and the influence of multi-cation, processing parameters and the impact of chemical modification on the A-site of the hybrid perovskite thin films with GA cation were shown. In the second part of the book, by introducing alternative hole transport materials to perovskite solar cell device, the use of hole transport materials which is still essential for efficient charge carrier extraction in perovskite solar cells was shown.