Optical and structural properties of the Fe 3+ -doped Lu 3 Al 5 O 12 :Ce 3+ garnet phosphor

A novel series of Lu Al Fe O :Ce (0.00 ≤ ≤ 0.45) garnets were obtained by the solid-state reaction method at 1200 °C. The obtained materials were characterized by X-ray diffraction, Rietveld refinement, UV-Vis diffuse reflectance spectroscopy, absorption spectroscopy, and photoluminescence spectrosc...

Full description

Saved in:
Bibliographic Details
Published in:RSC advances 2021-03, Vol.11 (20), p.11804-11812
Main Authors: Varela, Christian F, Molina, Yeison D, Gutiérrez, S Sandoval, Moreno-Aldana, L C, Vargas, C A Parra
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A novel series of Lu Al Fe O :Ce (0.00 ≤ ≤ 0.45) garnets were obtained by the solid-state reaction method at 1200 °C. The obtained materials were characterized by X-ray diffraction, Rietveld refinement, UV-Vis diffuse reflectance spectroscopy, absorption spectroscopy, and photoluminescence spectroscopy. Fe doping allowed obtaining pure-phase materials at temperatures and times below those reported up to now. On the other hand, the materials reached an improved blue absorption and a tunable emission from green to orange. These optical properties are attributable to a red-shift phenomenon due to an increase of the crystal field splitting in the Ce energy-levels. Moreover, the obtained phosphors exhibited a high quantum yield (55-67%), excellent thermal photoluminescence stability (up to 200 °C), and high color conversion, making the obtained phosphors promising candidates for w-LEDs.
ISSN:2046-2069
2046-2069
DOI:10.1039/D1RA01345A