Crystallographic, magnetic and luminescence characteristics of CuIn2Se4 with a cadmium thioaluminate structure and Cu(In1−xGax)2Se4 solid solutions (0 < x ≤ 0.3)

The crystallographic parameters of CuIn 2 Se 4 possessing a CdAl 2 S 4 -type crystal structure and Cu(In 1− x Ga x ) 2 Se 4 solid solutions based on it were determined. The evaluated magnetic properties confirmed the presence of copper(II) in the crystal lattices of CuIn 2 Se 4 and Cu(In 0.7 Ga 0.3 ) 2 Se 4 solid solutions, which are semiconductors with band gaps of ≥1.08 and ≥1.17 eV (at 298 K), respectively, found from their cathodoluminescence spectra.