Fabrication of meso- and macro-porous Y2WO6:Eu3+ phosphor thin films by Pechini-type sol–gel dip-coating method and their characteristic optical properties

研究成果: Article査読

抄録

Meso- and macro-porous Y2WO6:Eu3+ phosphor thin films were fabricated on silica glass substrates by a Pechini-type sol–gel dip-coating method. Precursor solutions for coating were prepared by mixing aqueous solutions of metal salts, ethylene glycol, and citric acid with water–alcohol solutions of a nonionic triblock copolymer (P-123) employed as a structure-directing agent. The kind of the alcohol solvents (methanol, ethanol, or isopropanol) and the amount of ethylene glycol were systematically examined because they were found to be major factors that could influence the shape and size of pores formed in the resulting thin films. The transmittance for the visible light was decreased in the thin films having macropores due to the light scattering. The red photoluminescence of the Eu3+ ions could be enhanced in these macro-porous thin films, especially from their surface, by a synergetic effect of increased multiple scattering and suppressed internal reflection of the emission light. The relationship between the microstructure and the optical properties of the porous Y2WO6:Eu3+ thin films was then discussed based on the experimental results. [Figure not available: see fulltext.]

本文言語English
ページ(範囲)232-243
ページ数12
ジャーナルJournal of Sol-Gel Science and Technology
100
2
DOI
出版ステータスPublished - 2021 11月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • 化学 (全般)
  • 生体材料
  • 凝縮系物理学
  • 材料化学

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