Structural Characterization Of CdSe and ZnSe Nanostructures

Abstract

Chemically bath deposited CdSe and ZnSe powder possesses mixed type structures whereas it is hexagonal wurtzite type in thin film form. SEM images of CdSe symmetrically exhibit the growth of spherical, rod and the rose(flower) type microstructures. ZnSe shows fine grain structures. The growth of microstructures in these selenides according to the growth direction along c‐axis of hexagonal wurtzite crystal. Photoluminescence shows strong blue luminescence at 414 and 437 nm in CdSe nanoparticles. ZnSe shows strong PL at 650 nm that is attributed to the strong d‐native traps. The blue shifted band gap luminescence at 392 nm shows the quantum confinement in ZnSe nanoparticles.