Boosted performances of mesoscopic perovskite solar cells using LaFeO3 inorganic perovskite nanomaterial

•LaFeO3 was used as an inorganic perovskite nanomaterial to modify the ETL of PSCs.•Several LaFeO3 amounts were added to the ETL of PSCs as the renewable energy source.•The highest efficiency of 17.05% was measured for the cell containing 6 mg LaFeO3.•The champion device exhibited JSC = 21.12 mA.cm−2, VOC = 1.044 V and FF = 77.33%.•The lowest recombination of charge carriers was happened in the champion PSC.