Dey, Chirantan and Karmakar, Basudeb (2017) In situ generated CdS nanostructure induced enhanced photoluminescence from Dy3+ ions doped dielectric nanocomposites. Physica Status Solidi A-Appications and Materials Science, 214 (8). Article No-1700105 . ISSN 0031-8965

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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 5-11nm to 50-80nm. Bandgap enhancement for the carrier confinement was found to alter within the range of 0.20-0.38eV. Phonon confinement effect has been confirmed by blue shifting of Raman peak for CdS NCs at 303cm(-1). Enhanced highly intense sharp PL peak at 576nm was detected, and different parameters associated with the PL enhancement including energy transfer from CdS NCs to Dy3+ 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.

Item Type: Article
Subjects: Glass
Divisions: Glass
Depositing User: Bidhan Chaudhuri
Date Deposited: 24 Jan 2018 07:30
Last Modified: 24 Jan 2018 07:30

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