X-ray absorption near-edge spectroscopy study of photoluminescent Ca2.955Sc2-xAlxSi3O12:Ce3+ green phosphors

Yun Fang Wu, Jau Wern Chiou, Yung Tang Nien, Chen Lin Yeh, In Gann Chen, Jyh Fu Lee

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Al3+ co-doped Ca2.955Sc2Si3O12:Ce3+ green phosphors were systematically investigated using X-ray absorption near-edge spectroscopy (XANES) to understand the influence of Al3+ incorporation on photoluminescence behavior. XANES analysis was used to confirm the doping site of Al atoms in the Ca2.955Sc2Si3O12:Ce3+ host, the valence state of Ce atoms, the symmetry around Ca and Ce atoms, and the bonding modes of oxygen atoms with cation atoms in the as-prepared Ca2.955Sc2-xAlxSi3O12:Ce3+ (CSAS:Ce). XANES results indicate that Al3+ occupies the Sc3+ sites and stabilizes the crystal structure of the host material. Furthermore, Al3+ can effectively inhibit the oxidization of Ce3+ to Ce4+, which enhances the photoluminescence of CSAS:Ce green phosphors.

Original languageEnglish
Pages (from-to)4538-4543
Number of pages6
JournalCeramics International
Volume41
Issue number3
DOIs
Publication statusPublished - 2015 Apr 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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