Premium
In situ generated CdS nanostructure induced enhanced photoluminescence from Dy 3+ ions doped dielectric nanocomposites
Author(s) -
Dey Chirantan,
Karmakar Basudeb
Publication year - 2017
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201700105
Subject(s) - photoluminescence , materials science , raman spectroscopy , dielectric , analytical chemistry (journal) , transmission electron microscopy , band gap , nanocomposite , doping , spectroscopy , nanostructure , scanning electron microscope , nanoparticle , nanotechnology , optoelectronics , optics , chemistry , physics , chromatography , quantum mechanics , composite material
We report CdS nanostructure induced enhanced photoluminescence (PL) from Dy +3 :CdS co‐doped dielectric‐nanocomposites synthesized by the conventional melt‐quench technique. CdS nanocrystals (NCs) were synthesized as in situ within the dielectric medium and their growth was controlled by heat treatment duration. Nanoparticles were investigated with absorption spectroscopy, X‐ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), and Raman spectroscopy. The experimentally obtained sizes of the NCs are found to increase from 5–11 nm to 50–80 nm. Bandgap enhancement for the carrier confinement was found to alter within the range of 0.20–0.38 eV. Phonon confinement effect has been confirmed by blue shifting of Raman peak for CdS NCs at 303 cm −1 . Enhanced highly intense sharp PL peak at 576 nm was detected, and different parameters associated with the PL enhancement including energy transfer from CdS NCs to Dy 3+ ions have been studied. This PL enhancement was steered by varying CdS NC sizes. Enhanced PL of these nanocomposites finds their potential applications as gain medium in the field of solid state lasers.