Influence of the base material on the interface properties of ZnO:Al/n-CdS/p-Cd1−xZnxTe heterojunctions

Abstract

Abstract Researches of I–V-characteristics and C-V-characteristics of structures fabricated on unannealed and annealed at high temperature (t = 900 °C) p-Cd1−xZnxTe substrates have been carried out. The influence of the intrinsic point defects system of the base material p-Cd1−xZnxTe on the interface properties of ZnO:Al/n-CdS/p-Cd1−xZnxTe heterojunctions have been studied. The above structures have been fabricated by sequential deposition of CdS and ZnO:Al thin films on crystalline p-Cd1−xZnxTe by high-frequency magnetron sputtering. Based on the analysis of the I–V-characteristics in the region of forward and reverse biases, the relationship between the physical processes during heat treatment and the structural perfection of the transition area of the studied heterojunctions have been established.