Solution-processed Er3+-doped As3S7 chalcogenide films: optical properties and 1.5 μm photoluminescence activated by thermal treatment


We report on the optical properties of Er-doped As3S7 chalcogenide films prepared using the two step dissolution process utilizing the As3S7 glass dissolved with propylamine and by further addition of the tris(8-hydroxyquinolinato)erbium(III) (ErQ) complex acting as an Er3+ precursor. The highest PL emission intensity was achieved for As3S7 films post-annealed at 300 °C and doped with 1 at% of Er which is beyond the normal Er3+ solubility limit of As–S melt quenched glasses.