A₂AgCrCl₆ (A = Li, Na, K, Rb, Cs) halide double perovskites: a transition metal-based semiconducting material series with appreciable optical characteristics

The theoretical examination of the geometric, energetic, phonon and optoelectronic properties of cubic and hexagonal A₂AgCrCl₆ (A = Cs, Rb, K, Na, Li) using meta-GGA SCAN-<italic>rVV</italic>10 has led us to identify cubic Cs₂AgCrCl₆ and Rb₂AgCrCl₆ as two dynamically stable double perovskites, with impressive optical features.

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