Abstract
The intermediate solid solution, γ-phase, exists in the CuInSe 2+2CdS⇔CuInS 2+2CdSe reciprocal system. It crystallizes in the cubic structure and has a wide homogeneity range. Single crystals of the γ-phase are grown by a modified Bridgman method and their composition, crystal structure, optical and electrical properties are studied. The band gap varies from 1.43 to 1.05 eV along the ‘Cu 3Cd 2In 3S 8’–‘CuCd 2InSe 4’ compositional section. The crystals are photosensitive, mostly p-type, with hole concentrations in the 10 15–10 16 cm −3 range and mobilities up to 18 cm 2/V s. The results indicate that the γ-phase can be considered as a new absorbing material for thin-film solar cells.
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