Cu3In5S9single crystals growth and the investigation of their photoelectric properties

The state diagram of the CuInS₂In₂S₃ system has been investigated. It has been found that at 25 mol% In₂S₃, the Cu₃In₅S₉, melting congruently at 1085°C, is formed. Cu₃In₅S₉ single crystals have a layered structure and are crystallised in a monoclinic structure with the parameters a=6.6 Å, β=6.91 Å, c=8.12 Å; β=89; z=1. Certain semiconductor parameters of Cu₃In₅S₉ single crystals have been obtained from photoelectric studies.