Researchers have explored the effects of pressure on the structural, electronic, and optical properties of tin-based halide perovskites (MSnX3, where M = Li, Na; X = Cl, Br, I) using density functional theory. The study revealed that increasing pressure reduces lattice constants and narrows the band gaps, with significant changes observed when anions shift from Cl to I. Under pressures exceeding 5 GPa, certain compounds may exhibit metallic behavior. Optical analysis showed improved static dielectric constants and enhanced optical absorption in the visible spectrum, highlighting their potential for solar cell applications. The findings underscore how pressure can fine-tune perovskite properties, paving the way for advanced photovoltaic and optoelectronic devices.
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