A proposal for <i>p</i>-type ZnS1-<i>x</i>Se<i>x</i>–ZnTe superlattices

Abstract

Energy band structures ZnSe–ZnTe and ZnS0.5Se0.5 –ZnTe superlattices are calculated using the Kronig-Penney model taking into account strain effects due to the lattice mismatches between the materials. The ZnSe(30 Å)–ZnTe(5 Å) and the ZnS0.5Se0.5 (30 Å)–ZnTe(5 Å) superlattices have energy gaps of 2.5 and 2.7 eV, respectively. The ZnS0.5Se0.5 (30 Å)–p-type ZnTe(5 Å) superlattice is considered to be a p-type material of 1017 cm−3 and to be available for a hole injection layer to an n-type ZnSe layer.