Yolk-shell structured Y2O3:Eu3+ phosphor powders with enhanced photoluminescence properties prepared by spray pyrolysis

Jung Sang Cho, Kwang Min Yang, Yun Chan Kang

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Highly crystalline Y2O3:Eu3+ yolk-shell phosphor powders with enhanced photoluminescence intensity are successfully prepared by spray pyrolysis. The Y2O3:Eu3+ yolk-shell powder is formed directly from each droplet containing yttrium and europium salts and sucrose inside a hot-wall reactor that is maintained at 900 °C. The yolk-shell structure of the phosphor powder is maintained even at a high post-treatment temperature of 1200 °C, exhibiting the maximum photoluminescence intensity. For comparison, a spherical shape Y 2O3:Eu3+ phosphor powder is also prepared by the same procedure but without sucrose during spray pyrolysis. The photoluminescence intensity of the Y2O3:Eu3+ yolk-shell powder is 171% of that of the spherical shape phosphor powder at a post-treatment temperature of 1200 °C. The morphological advantage of a yolk-shell phosphor powder with a core@void@shell configuration inducing higher absorption of excitation light in the structure is attributed to multiple light-reflecting and light-scattering in the interstitial void between the core and the shell.

Original languageEnglish
Pages (from-to)6170-6174
Number of pages5
JournalCrystEngComm
Volume16
Issue number27
DOIs
Publication statusPublished - 2014 Jul 21
Externally publishedYes

Fingerprint

Spray pyrolysis
Phosphors
Powders
phosphors
pyrolysis
sprayers
Photoluminescence
photoluminescence
sucrose
Sugar (sucrose)
Sucrose
voids
Europium
Yttrium
europium
yttrium
Light scattering
interstitials
light scattering
Salts

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Yolk-shell structured Y2O3:Eu3+ phosphor powders with enhanced photoluminescence properties prepared by spray pyrolysis. / Cho, Jung Sang; Yang, Kwang Min; Kang, Yun Chan.

In: CrystEngComm, Vol. 16, No. 27, 21.07.2014, p. 6170-6174.

Research output: Contribution to journalArticle

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