Perovskite phase formation in formamidinium-methylammonium lead iodide bromide (FAPbl_3)_(1-x)(MAPbBr_3)_x materials and their morphological, optical and photovoltaic properties

摘要

This manuscript describes the synthesis of formamidinium lead iodide (FAPbI(3)) thin films annealed at different temperatures to investigate the perovskite phase formation temperature and check its effect on morphology and optical properties. By using these materials, inverted perovskite solar cells devices were also fabricated for the photovoltaic properties. Devices with FAPbI(3) annealed at 130 degrees C and higher temperature have shown power conversion efficiency11%. Second, formamidinium-methylammonium lead iodide bromide (FAPbI(3))(1-x) (MAPbBr(3))(x) (x=0, 0.05, 0.1, 0.15, 0.2 and 1) was used as the absorbing layer in perovskite solar cells and the best PCE of 14.99% was observed with x=0.1. Films were characterized by XRD, UV-vis absorption spectroscopy, photoluminescence, SEM and AFM.