Keywords:organic-inorganic perovskite, quaternary amine, polythiophene
Control of the optical properties and development of new physical properties of the lead halide-based organic-inorganic perovskites would be possible by changing the amine species of the organic layer. In this study, to investigate the effects of electronic state and types of amines on the properties of perovskites, primary and quaternary alkylammoniums, and polythiophene derivatives with these ammoniums on the side chain were used as amines. The formation of layered structures was confirmed by X-ray diffraction of perovskite films prepared from these amines and lead bromide. The exciton absorption peak shifted depending on the type of amines, and optical properties could be controlled.