Fabrication and optical properties of NUV-emitting SiO2-SrB4O7:Eu2+ glass-ceramic thin films

Chie Iwamoto, Shinobu Fujihara

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

SiO2-SrB4O7:Eu2+ glass-ceramic thin films were fabricated for possible application in near ultraviolet (NUV) emitting devices. Nano-sized SrB4O7:Eu2+ powders were prepared by a Pechini-type sol-gel method and a subsequent ball-milling treatment. The powders showed NUV emissions centered at 367 nm, upon irradiation with UV of shorter wavelengths, due to an allowed 4f65d1 → 4f7 electronic transition of Eu2+ ions. The glass-ceramic thin films were prepared by dip-coating of tetraethylorthosilicate (TEOS) solutions dispersed with the nano-sized SrB4O7:Eu2+ powders and a subsequent heat-treatment. It was found that the glass-ceramic thin films had relatively high thermal stability up to 800 °C in terms of the Eu2+ emissions. SiO2 layers surrounding SrB4O7:Eu2+ appeared to be effective for the surface passivation of the phosphor particles.

Original languageEnglish
Pages (from-to)1614-1619
Number of pages6
JournalOptical Materials
Volume31
Issue number11
DOIs
Publication statusPublished - 2009 Sep

Keywords

  • Glass-ceramics
  • Phosphor
  • UV materials

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering

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