Influence of the growth temperature and annealing on the optical properties of {CdO/ZnO}30 superlattices

TL;DR

This study investigates how growth temperature and annealing affect the optical properties of CdO/ZnO superlattices grown by plasma-assisted MBE, revealing temperature-dependent quality and defect-related luminescence changes.

Contribution

It provides new insights into the influence of growth temperature and annealing on the optical characteristics of CdO/ZnO superlattices.

Findings

Growth temperature affects superlattice quality and optical properties.

Annealing induces defect luminescence at different energies.

Luminescence intensity depends on initial growth temperature.

Abstract

Optical properties of the short period {CdO/ZnO} superlattices grown by plasma assisted MBE were analyzed. The superlattice (SLs) structures were successfully obtained at different growth temperatures from 360 to 550 {\deg}C. Interestingly, the growth temperature of the SLs influences quality of multilayers and also optical properties of these structures. After annealing at 900{\deg}C by rapid thermal method various defect luminescence located at different energetic positions , were detected, and intensity of luminescence strongly depends on applied growth temperature.