Structural, electrical, and optical properties of As2S3–Cu6PS5I nanocomposites

As2S3–Cu6PS5I nanocomposites are prepared by incorporation of nanocrystals of Cu6PS5I superionic conductor in As2S3 glass matrix. Their structural studies by scanning electronic microscopy are performed and the electrical conductivity of the nanocomposites is investigated. The temperature dependence of the nanocomposite optical absorption edge is studied; a non-Urbach behaviour of the absorption edge is revealed. Influence of different types of disordering on the optical absorption edge is studied.