Structure and optical properties of (Gd,Eu)F3-nanocrystallized sol-gel silica films

Shinobu Fujihara, Shinnosuke Koji, Toshio Kimura

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Transparent, luminescent sol-gel silica films were fabricated on the basis of a SiO2-(Gd,Eu)F3 nanocomposite structure, in which (Gd,Eu)F3 nanocrystals were dispersed in a silica matrix. The films were coated on silica glass substrates at low temperatures of 300-500°C using trifluoroacetic acid as a fluorine source. Doping Eu3+ ions into the films led to narrow emission lines upon ultraviolet (UV) excitation, indicating that Eu3+ was selectively incorporated into the GdF 3 or GdOF nanocrystals. While magnetic dipole 5D 07F1 transitions were dominant in the SiO2-(Gd,Eu)F3 films that were heat-treated at 300 or 400°C, forced electric dipole 5D07F2 transitions had a higher probability in the SiO 2-(Gd,Eu)OF film that was heat-treated at 500°C. The efficiency of the UV light excitation at 274 and 256 nm was promoted by the energy transfer from Gd3+ to Eu3+ and the charge transfer from O 2- to Eu3+ in photoluminescence, respectively.

Original languageEnglish
Pages (from-to)1331-1335
Number of pages5
JournalJournal of Materials Chemistry
Volume14
Issue number8
DOIs
Publication statusPublished - 2004 Apr 21

Fingerprint

Silica Gel
silica gel
Sol-gels
Optical properties
Silica
optical properties
Nanocrystals
nanocrystals
Trifluoroacetic acid
Trifluoroacetic Acid
heat
Fluorine
silica glass
Fused silica
magnetic dipoles
Silicon Dioxide
ultraviolet radiation
Energy transfer
electric dipoles
excitation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Chemistry
  • Materials Science(all)

Cite this

Structure and optical properties of (Gd,Eu)F3-nanocrystallized sol-gel silica films. / Fujihara, Shinobu; Koji, Shinnosuke; Kimura, Toshio.

In: Journal of Materials Chemistry, Vol. 14, No. 8, 21.04.2004, p. 1331-1335.

Research output: Contribution to journalArticle

@article{2a7209c3fef6440c878e258045f0a58c,
title = "Structure and optical properties of (Gd,Eu)F3-nanocrystallized sol-gel silica films",
abstract = "Transparent, luminescent sol-gel silica films were fabricated on the basis of a SiO2-(Gd,Eu)F3 nanocomposite structure, in which (Gd,Eu)F3 nanocrystals were dispersed in a silica matrix. The films were coated on silica glass substrates at low temperatures of 300-500°C using trifluoroacetic acid as a fluorine source. Doping Eu3+ ions into the films led to narrow emission lines upon ultraviolet (UV) excitation, indicating that Eu3+ was selectively incorporated into the GdF 3 or GdOF nanocrystals. While magnetic dipole 5D 0 → 7F1 transitions were dominant in the SiO2-(Gd,Eu)F3 films that were heat-treated at 300 or 400°C, forced electric dipole 5D0 → 7F2 transitions had a higher probability in the SiO 2-(Gd,Eu)OF film that was heat-treated at 500°C. The efficiency of the UV light excitation at 274 and 256 nm was promoted by the energy transfer from Gd3+ to Eu3+ and the charge transfer from O 2- to Eu3+ in photoluminescence, respectively.",
author = "Shinobu Fujihara and Shinnosuke Koji and Toshio Kimura",
year = "2004",
month = "4",
day = "21",
doi = "10.1039/b313784h",
language = "English",
volume = "14",
pages = "1331--1335",
journal = "Journal of Materials Chemistry",
issn = "0959-9428",
publisher = "Royal Society of Chemistry",
number = "8",

}

TY - JOUR

T1 - Structure and optical properties of (Gd,Eu)F3-nanocrystallized sol-gel silica films

AU - Fujihara, Shinobu

AU - Koji, Shinnosuke

AU - Kimura, Toshio

PY - 2004/4/21

Y1 - 2004/4/21

N2 - Transparent, luminescent sol-gel silica films were fabricated on the basis of a SiO2-(Gd,Eu)F3 nanocomposite structure, in which (Gd,Eu)F3 nanocrystals were dispersed in a silica matrix. The films were coated on silica glass substrates at low temperatures of 300-500°C using trifluoroacetic acid as a fluorine source. Doping Eu3+ ions into the films led to narrow emission lines upon ultraviolet (UV) excitation, indicating that Eu3+ was selectively incorporated into the GdF 3 or GdOF nanocrystals. While magnetic dipole 5D 0 → 7F1 transitions were dominant in the SiO2-(Gd,Eu)F3 films that were heat-treated at 300 or 400°C, forced electric dipole 5D0 → 7F2 transitions had a higher probability in the SiO 2-(Gd,Eu)OF film that was heat-treated at 500°C. The efficiency of the UV light excitation at 274 and 256 nm was promoted by the energy transfer from Gd3+ to Eu3+ and the charge transfer from O 2- to Eu3+ in photoluminescence, respectively.

AB - Transparent, luminescent sol-gel silica films were fabricated on the basis of a SiO2-(Gd,Eu)F3 nanocomposite structure, in which (Gd,Eu)F3 nanocrystals were dispersed in a silica matrix. The films were coated on silica glass substrates at low temperatures of 300-500°C using trifluoroacetic acid as a fluorine source. Doping Eu3+ ions into the films led to narrow emission lines upon ultraviolet (UV) excitation, indicating that Eu3+ was selectively incorporated into the GdF 3 or GdOF nanocrystals. While magnetic dipole 5D 0 → 7F1 transitions were dominant in the SiO2-(Gd,Eu)F3 films that were heat-treated at 300 or 400°C, forced electric dipole 5D0 → 7F2 transitions had a higher probability in the SiO 2-(Gd,Eu)OF film that was heat-treated at 500°C. The efficiency of the UV light excitation at 274 and 256 nm was promoted by the energy transfer from Gd3+ to Eu3+ and the charge transfer from O 2- to Eu3+ in photoluminescence, respectively.

UR - http://www.scopus.com/inward/record.url?scp=2042477350&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=2042477350&partnerID=8YFLogxK

U2 - 10.1039/b313784h

DO - 10.1039/b313784h

M3 - Article

AN - SCOPUS:2042477350

VL - 14

SP - 1331

EP - 1335

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

SN - 0959-9428

IS - 8

ER -