A study on growth of ZnSe quantum dots through chemical route

Abstract

A study on growth of ZnSe nanostructures in wet chemical bath deposition has been made. The structural and optical characterizations of the samples are done by XRD, UV-VIS and PL spectroscopy. XRD shows the dominant wurtzite structure along with the oxide trace. Oxidation broadens the absorption edges and lowers the band gaps. PL spectra show near band gap emissions in the range 418 nm-421 nm along with the additional impurity emissions around 462 nm, 488 nm & 532 nm. These impurity emissions may be attributed to inherent defects on the surface that can emit band-trap emissions.

Keywords

• ZnSe
• oxidation
• wurtzite
• absorption
• photoluminescence