ABSTRACT
The temperature dependence of the electrical and optical properties of polycrystalline bulk samples of CuIn3Se5 is reported From the optical absorption spectra, the energy gap and the free-exciton binding energy are calculated The Debye temperature is also estimated Four donor levels around 15, 25, 65 and 120 meV and an acceptor level at 125 meV are obtained from a combined analysis of the electrical resistivity and photoluminescence spectra.
