Abstarct: In this research, we study and simulate planar n-i-p perovskite solar cells using inorganic materials. In recent years, researchers have paid special attention to perovskite solar cells for various reasons, such as high absorption coefficient, adjustable band gap, long penetration length of carriers, etc., therefore, this type of cell has shown considerable growth in the last few years. To improve the performance of the perovskite solar cell, special attention should be paid to its efficiency and stability. In order to increase the efficiency of this type of cell, the problem of aligning the energy levels of different laxyers was used, which leads to the reduction of values of capacitance band offset and conduction band offset parameters. To improve the stability of different perovskite solar cell structures, in the absorber laxyer and in the B cation position, tin (Sn) and germanium (Ge) materials are used instead of the toxic lead (Pb) material that reacts quickly in environmental conditions and destroys the performance of this type. It becomes a cell, it was used. Also, cesium (Cs) and formamidinium (FA) materials were used in place of cation A with the aim of improving stability under temperature changes. In the electron transfer laxyer and the hole transfer laxyer, inorganic materials were used instead of organic materials at the same time, due to their non-volatility and in order to make the perovskite solar cell more stable, in order to maintain its performance structure well. By doing these things, the perovskite solar cell will have less than 10% efficiency loss in environmental conditions and when exposed to sunlight with a temperature of 85°C. After simulation, five structures were selected among different structures in terms of higher efficiency and more stability and their optimization was done. the structure number 6, FTO/SnO2/CsSn0.5Ge0.5I3/NiO/Au, taking into account the stability and efficiency loss due to temperature changes, obtained the value of 61.57% as efficiency. In this research, after studying the efficiency and stability of different structures, their simulation has been done by SCAPS software.