Photoelectric properties ofp-CuInSe2 thin films obtained by pulsed laser vaporization

Abstract

Using the method of phase-sensitive detection, we investigated the photoconductivity spectra of polycrystalline p-CuInSe2 films obtained in vacuum by the method of pulsed laser vaporization of initial single crystals. We show that, in contrast to single crystals, films are characterized by monopolar photoconductivity in the extrinsic and intrinsic regions of optical absorption and by a linear mechanism of recombination of nonequilibrium charge carriers at the intensities of illumination 0–100 mW/cm2 in the temperature range 80–300 K.