Potential lead-free small band gap halide double perovskites CsCuMCl (M = Sb, Bi) for green technology.

Explorations of stable lead-free perovskites have currently achieved substantial interest to overcome the instability and avoid toxicity related issue faced with the lead-based perovskites. In this study, we have comprehensively studied the stability, nature and origin of electronic, transport and optical properties of inorganic halide double perovskites, which could provide a better understanding of their possible potential applications. The density functional theory is used to investigate the different physical properties of these materials.

Study of the magneto-electronic, optical, thermal and thermoelectric applications of double perovskites BaMTaO (M = Er, Tm).

The structural, electronic, optical, thermodynamic and thermoelectric properties of double perovskites BaMTaO (M = Er, Tm) have been studied. These alloys stabilize in cubic structure with paramagnetic phases and structural parameters that are in good agreement with experimental results. The elastic parameters reveal both materials as being super hard and brittle in nature.