Photophysical Properties of Heterogeneous AgBr Layers

Abstract

By Multi Source Physical Vapour Deposition (MS‐PVD) the preparation of mixed thin layers consisting of different inorganic or organic substances is possible. By this method it was investigated which effect admixture of different metal halides (NaX, PbX2) had on structure and photosensitivity of evaporated AgBr layers. Unexpectedly the mixed layers revealed a considerable increase in photosensitivity in the range between 20 and 60 vol‐% metal halide admixture as compared to pure AgBr.—The results of photo‐EMF and microwave photoconductivity measurements are indicative of an effective charge carrier separation at the segregated crystallite phase boundaries.