Preparation and luminescence properties of Ce3+-doped Gd5Si3O12N phosphor emerging red shift

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Abstract

Blue-emitting phosphors (Gd1-xCex)5Si3O12N (0 ≤ x ≤ 0.07) were prepared through a solid-state reaction under a reducing atmosphere. The excitation spectra exhibited several broad bands in the wavelength range from 240 to 400 nm, and the emission spectra consisted of a broad band covering from 360 to 550 nm. Two different emission centers corresponding to two different crystallographic sites in the host lattice were confirmed. The influence that the Ce3+ concentration had on the photoluminescence of the prepared samples was examined, and the results indicate that an increase in the Ce3+ concentration introduces a red-shift of the emission peak due to an increase in the Stokes shift. Concentration quenching occurs when the Ce3+ content exceeds 3 mol%. In addition, the configurational coordinate model was used to finely explain the thermal quenching behavior of the phosphors.

Original languageEnglish
Pages (from-to)330-336
Number of pages7
JournalMaterials Research Bulletin
Volume88
DOIs
StatePublished - 1 Apr 2017

Keywords

  • Ce
  • Luminescence
  • Oxynitride
  • Quenching

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