Influence of the Ferroelectric Phase Transition on the Photoelectrical Properties of the P-N Junctions

Abstract

ABSTRACTPhotoelectrical properties of the p-n junctions on the base of Pb1−xGexTe were investigated. A number of anomalous phenomena below Tc such as: the change of the photovoltage sign, low frequency maximum in the temperature dependence of the junction capacitance and feature near the edge of the spectral dependence were observed.To explain the obtained results a model considering screening of spontaneous polarization outside the junction was proposed. This work gave for the first time experimental evidence concerning the model of polarization switching in ferroelectric with p-n junction.