Yolk-shell structured Gd 2 O 3 :Eu 3+ phosphor prepared by spray pyrolysis

The effect of preparation conditions on microstructure and luminescence properties

Jung Sang Cho, Kyeong Youl Jung, Yun Chan Kang

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Gd 2 O 3 :Eu 3+ yolk-shell phosphor powders with high photoluminescence intensity were prepared by spray pyrolysis. Preparation temperature and spray solution concentration were varied to find the optimum process conditions for preparation of Gd 2 O 3 :Eu 3+ with yolk-shell structure. The formation mechanism of yolk-shell Gd 2 O 3 :Eu 3+ was systematically investigated by observing the microstructures of particles produced under various preparation conditions. The morphological structure of Gd 2 O 3 :Eu 3+ powders was clearly dependent on reactor temperature and on the precursor solution concentration. Eventually, pure yolk-shell structured Gd 2 O 3 :Eu 3+ powders were obtained for a reaction temperature of 1000°C and concentration of the spray solution below 0.2 M. Also, the yolk-shell structure formed showed high thermal stability, making it possible to maintain the original spherical yolk-shell structure through calcination at high temperatures. As a result, highly crystalline Gd 2 O 3 :Eu 3+ phosphor powders having yolk-shell structure and an agglomeration-free spherical shape were successfully synthesized by spray pyrolysis. These phosphor powders were shown to have good photoluminescence characteristics.

Original languageEnglish
Pages (from-to)1325-1331
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume17
Issue number2
DOIs
Publication statusPublished - 2015 Jan 14

Fingerprint

Spray pyrolysis
Luminescence
Phosphors
Powders
phosphors
pyrolysis
sprayers
luminescence
preparation
microstructure
Microstructure
Temperature
Photoluminescence
photoluminescence
spherical shells
agglomeration
Calcination
roasting
temperature
Thermodynamic stability

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

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title = "Yolk-shell structured Gd 2 O 3 :Eu 3+ phosphor prepared by spray pyrolysis: The effect of preparation conditions on microstructure and luminescence properties",
abstract = "Gd 2 O 3 :Eu 3+ yolk-shell phosphor powders with high photoluminescence intensity were prepared by spray pyrolysis. Preparation temperature and spray solution concentration were varied to find the optimum process conditions for preparation of Gd 2 O 3 :Eu 3+ with yolk-shell structure. The formation mechanism of yolk-shell Gd 2 O 3 :Eu 3+ was systematically investigated by observing the microstructures of particles produced under various preparation conditions. The morphological structure of Gd 2 O 3 :Eu 3+ powders was clearly dependent on reactor temperature and on the precursor solution concentration. Eventually, pure yolk-shell structured Gd 2 O 3 :Eu 3+ powders were obtained for a reaction temperature of 1000°C and concentration of the spray solution below 0.2 M. Also, the yolk-shell structure formed showed high thermal stability, making it possible to maintain the original spherical yolk-shell structure through calcination at high temperatures. As a result, highly crystalline Gd 2 O 3 :Eu 3+ phosphor powders having yolk-shell structure and an agglomeration-free spherical shape were successfully synthesized by spray pyrolysis. These phosphor powders were shown to have good photoluminescence characteristics.",
author = "Cho, {Jung Sang} and Jung, {Kyeong Youl} and Kang, {Yun Chan}",
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AB - Gd 2 O 3 :Eu 3+ yolk-shell phosphor powders with high photoluminescence intensity were prepared by spray pyrolysis. Preparation temperature and spray solution concentration were varied to find the optimum process conditions for preparation of Gd 2 O 3 :Eu 3+ with yolk-shell structure. The formation mechanism of yolk-shell Gd 2 O 3 :Eu 3+ was systematically investigated by observing the microstructures of particles produced under various preparation conditions. The morphological structure of Gd 2 O 3 :Eu 3+ powders was clearly dependent on reactor temperature and on the precursor solution concentration. Eventually, pure yolk-shell structured Gd 2 O 3 :Eu 3+ powders were obtained for a reaction temperature of 1000°C and concentration of the spray solution below 0.2 M. Also, the yolk-shell structure formed showed high thermal stability, making it possible to maintain the original spherical yolk-shell structure through calcination at high temperatures. As a result, highly crystalline Gd 2 O 3 :Eu 3+ phosphor powders having yolk-shell structure and an agglomeration-free spherical shape were successfully synthesized by spray pyrolysis. These phosphor powders were shown to have good photoluminescence characteristics.

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