Abstract
Lead free perovskites are crucial for the environmental friendly solar cell materials. ASnX3 (A = Rb, K; X = Cl, Br, I) perovskites have been relatively less explored compared to other compounds of the same family. In this work, inorganic halide based perovskites ASnX3 (A = Rb, K; X = Cl, Br, I) have been studied at zero and higher pressure. Interesting physical variations were observed in these materials under the application of pressure. Exchange correlation effects are suitably selected for the structural and optoelectronic properties. The absorption edge appears to red shifted as the influence of pressure on the compounds rises (red shift). Materials demonstrates higher absorption under the strained geometry. These materials can find certain applications in the optoelectronic devices owning to their suitable energy bandgaps.
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