Jump to main content
Jump to site search


The structures and luminescence properties of Sr4Gd3Na3(PO4)6F2:Ce3+,Tb3+ green phosphors with zero-thermal quenching of Tb3+ for WLEDs

Author affiliations

Abstract

In this paper, novel green-emitting Sr4Gd3Na3(PO4)6F2:Ce3+,Tb3+ phosphors with zero-thermal quenching of Tb3+ have been prepared and investigated. X-ray diffraction together with Rietveld structure refinement was employed to give an insight into the structures of the samples. The luminescence spectra at 300 K and 80 K confirmed that the Ce3+ ions in Sr4Gd3Na3(PO4)6F2:Ce3+ were distributed randomly on the cation sites and gave intense emission. Utilizing the Ce3+ → Tb3+ energy transfer, intense green emitting Sr4Gd3Na3(PO4)6F2:Ce3+,Tb3+ had been obtained. The energy migration mechanism of Ce3+ in Sr4Gd3Na3(PO4)6F2:Ce3+ and the energy transfer mechanism of Ce3+ → Tb3+ in Sr4Gd3Na3(PO4)6F2:Ce3+,Tb3+ were determined by the analysis of photoluminescence spectra and decay curves. Sr4Gd3Na3(PO4)6F2:Ce3+,Tb3+ exhibited a thermal-induced enhancement of Tb3+ emission at 25–300 °C, indicating an excellent thermal stability. Moreover, utilizing our prepared Sr4Gd3Na3(PO4)6F2:0.06Ce3+,0.15Tb3+ phosphor, green and white emitting LED devices have been fabricated. Our investigation indicated the potential application of prepared green phosphors in UV WLEDs and a feasible method to explore highly thermally stable phosphors utilizing the high thermal stability of donors together with energy transfer from donors to acceptors.

Graphical abstract: The structures and luminescence properties of Sr4Gd3Na3(PO4)6F2:Ce3+,Tb3+ green phosphors with zero-thermal quenching of Tb3+ for WLEDs

Back to tab navigation

Supplementary files

Article information


Submitted
07 Nov 2019
Accepted
28 Nov 2019
First published
28 Nov 2019

Dalton Trans., 2020, Advance Article
Article type
Paper

The structures and luminescence properties of Sr4Gd3Na3(PO4)6F2:Ce3+,Tb3+ green phosphors with zero-thermal quenching of Tb3+ for WLEDs

M. Jiao, L. Dong, Q. Xu, L. Zhang, D. Wang and C. Yang, Dalton Trans., 2020, Advance Article , DOI: 10.1039/C9DT04320A

Social activity

Search articles by author

Spotlight

Advertisements