Tunable photoluminescence properties of Dy3+ doped LLZO phosphors for WLED and dosimetry applications

Trivalent Dysprosium (Dy3+) activated garnet structured Li7La3Zr2O12 (LLZO) phosphors were synthesized by conventional solid state reaction method. The phase structure of the prepared Dy3+ doped LLZO powders was confirmed by X-ray diffraction and Raman spectroscopy studies. Field Emission Scanning E...

Full description

Saved in:
Bibliographic Details
Published inCeramics international Vol. 48; no. 1; pp. 1402 - 1407
Main Authors Kumar K, Ganesh, Bhargav P, Balaji, K, Aravinth, P, Ramasamy, Sen, Shashwati, Arumugam, Raja
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.01.2022
Subjects
CIE chromaticity
FESEM
Garnet structure
XPS
XRD
CIE chromaticity
Garnet structure
FESEM
TL
XPS
XRD
PL
Online AccessGet full text

Cover

More Information
Summary:Trivalent Dysprosium (Dy3+) activated garnet structured Li7La3Zr2O12 (LLZO) phosphors were synthesized by conventional solid state reaction method. The phase structure of the prepared Dy3+ doped LLZO powders was confirmed by X-ray diffraction and Raman spectroscopy studies. Field Emission Scanning Electron Microscopy (FESEM) studies indicated a change in morphology and an increase in the area of the intergranular Li–Al–O liquid layer is observed with the increase of Li and dopant concentrations. Composition analysis of the prepared samples was examined by X-ray photoelectron spectroscopy (XPS) analysis. PL emission band observed at 579 nm was assigned to4F9/2 - 6H13/2 transition in yellow region under the ultraviolet excitation wavelength of 351 nm. White light emission was confirmed by the Commission Internationale de L'Eclairage (CIE) chromatic coordinate graph. Thermoluminescence studies were carried out and the results indicated that the grown phosphors are suitable for industrial dosimetric applications where high doses are needed to be measured.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2021.09.226