Electrical properties and energy parameters of $n$-FeS$_{2}$/$p$-Cd$_{1-x}$Zn$_{x}$Te heterojunctions

The conditions for fabricating $n$-FeS$_{2}$/$p$-Cd$_{1-x}$Zn$_{x}$Te heterojunctions by the spray pyrolysis of thin pyrite films on $p$-Cd$_{1-x}$Zn$_{x}$Te crystalline substrates are investigated. A comprehensive analysis of the current–voltage (I–V) and capacitance–voltage ($C$–$V$) characteristics makes it possible to establish the limitation of the reverse current by the space-charge region at small reverse biases and consider the mechanisms of current formation with the participation of energy levels near the heterojunction. A model of the energy profile of the $n$-FeS$_{2}$/$p$-Cd$_{1-x}$Zn$_{x}$Te heterojunction is proposed, which turns out to be in good correspondence with the experimentally determined parameters and the dynamics of their change with a variation in temperature.