Light-induced electric conductivity in sn2P2S6

Abstract The experimental results of electrical conductivity temperature dependence and photoconductivity spectra studies of Sn2P2S6 ferroelectrics are reported. It is shown that dark electrical conductivity have two states—high-resistive (background) and low-resistive (induced by preliminary light irradiation). The results are explained in the framework of the small-radius polaron model.