Dimensional transition of CdxZn1-xTe nanostructures grown on ZnTe layers

Abstract

The atomic force microscopy images showed that the dimensional structural transformation from CdxZn1-xTe quantum dots (QDs) with Cd mole fractions of 0.5 and 0.6 to CdxZn1-xTe quantum wires occurred at a Cd mole fraction of 0.8. Photoluminescence spectra showed that the excitonic peak corresponding to the transition from the ground electronic subband to the ground heavy-hole band in CdxZn1-xTe/ZnTe nanostructures shifted to a lower energy with increasing Cd mole fraction. The activation energy of the electrons confined in the CdxZn1-xTe/ZnTe QDs with a Cd mole fraction of 0.6 was higher than those of electrons in CdxZn1-xTe/ZnTe nanostructures.