Temperature Control of Yellow Photoluminescence from SiO₂-Coated ZnO Nanocrystals.

ABSTRACT: In this study, we aimed to elucidate the effects of temperature on the photoluminescence from ZnO-SiO₂ nanocomposite and to describe the preparation of SiO₂-coated ZnO nanocrystals using a chemical precipitation method, as confirmed by Fourier transform infrared (FTIR) and powder X-ray diffraction analysis (XRD) techniques. Analyses using high-resolution transmission microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), dynamic light scattering (DLS), and electrophoretic light scattering (ELS) techniques showed that the new nanocomposite has an average size of 70 nm and 90% silica. Diffuse reflectance spectroscopy (DRS), photoluminescence (PL), and photoluminescence-excitation (PLE) measurements at different temperatures revealed two emission bands at 385 and

SUBMITTER: Kumar N 

PROVIDER: S-EPMC9565792 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature