perovskite  layers as a absorbing light play a key role in improving the performance of perovskite solar cells. The solvents used to make the perovskite layer are effective in the quality and operation of the solar cells. In this study, photovoltaic parameters of solar cells made with two organic solvents were investigated. Deposition were used by two step method. In the first step, lead was dissolved in two different organic solvents of dimethylformamide (DMF) and dimethylsulfoxide (DMSO) separately and deposited on a titanium oxide layer by rotary coating. In the second step, methyl aammonium iodide solution (MAI) was spin coated on lead iodide. The result of these two stages lead to formation of the MAPbI₃ layer on the TiO₂ porous layer. Studies show that, the photovoltaic parameters and morphology of the layer created with the DMF solvent is more favorable.
 

Keywords: perovskite solar cell, DMF, DMSO, Organic solvent, Two step spin coating.

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