The photoconductivity spectrum, thermally stimulated current, current-light characteristics and temperature-dependent photocurrent in Bridgman-grown ordered-vacancy Ga2Se3 crystals were studied. The observed temperature quenching of photoconductivity and two regions of its thermal activation in Ga2Se3 crystals were interpreted in terms of a multicenter recombination model which incorporates an s-channel of active recombination, r-centers of photosensitivity, and traps for non-equilibrium majority carriers.

Photoelectric Properties of Ordered-Vacancy Ga2Se3 Single Crystals. D.I.Bletskan, V.N.Kabatsii, M.Kranjčec: Inorganic Materials, 2010, 46[12], 1290-5