Microstructure and photoluminescent properties of Sr 2SiO 4:Eu 3+ phosphors with various NH 4Cl flux concentrations

Huang Yu Chen, Ru Yuan Yang, Shoou Jinn Chang, Yu Kai Yang

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Abstract

In this paper, effect of NH 4Cl flux concentrations (0, 1, 2, 3 and 4 wt%) on the crystal structure, morphology and photoluminescent properties of Sr 2SiO 4:Eu 3+ phosphors synthesized by a microwave sintering at 1200°C for 1 h was investigated and discussed. X-ray powder diffraction analysis showed the crystal structure was not affected and the pure Sr 2SiO 4 phase was formed without second phase or phases of starting materials when adding with the NH 4Cl flux. The SEM images indicated that increase of the NH 4Cl flux enlarged the particle size of the phosphor particles. The photo-luminescence results showed the addition of 1 wt% NH 4Cl flux much improved the emission intensity at λ em of 617 nm as the excitation spectrum at λ ex of 395 nm. The decay times of Sr 2SiO 4:Eu 3+ phosphors with different NH 4Cl flux concentrations were obtained around 2.47-2.52 ms.

Original languageEnglish
Pages (from-to)1412-1416
Number of pages5
JournalMaterials Research Bulletin
Volume47
Issue number6
DOIs
Publication statusPublished - 2012 Jun 1

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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