Broadband visible emissions from sol-gel-derived silica/poly(vinyl pyrrolidone) hybrids

Shinobu Fujihara, Seiki Kitta

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Photoluminescence (PL) of poly(vinyl pyrrolidone) (PVP) and silica/PVP hybrid films was investigated. The transparent PVP film was found to exhibit bluish PL centered at approximately 440 nm in response to ultraviolet (UV) light excitation. This PL behavior was made good use of in preparing luminescent silica/PVP hybrid films with high thermal stability at temperatures up to 250 °C. Europium-doped hybrid films exhibited white PL upon UV excitation, resulting from mixing of broadband PVP emissions and 5D07F2 emissions of Eu3+. Emission colors could be finely tuned by changing excitation wavelengths.

Original languageEnglish
Pages (from-to)479-483
Number of pages5
JournalChemical Physics Letters
Volume397
Issue number4-6
DOIs
Publication statusPublished - 2004 Oct 21

Fingerprint

Pyrrolidinones
Silicon Dioxide
Sol-gels
gels
silicon dioxide
broadband
Photoluminescence
photoluminescence
excitation
Europium
europium
ultraviolet radiation
thermal stability
color
Thermodynamic stability
Color
Wavelength
wavelengths
temperature

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

Cite this

Broadband visible emissions from sol-gel-derived silica/poly(vinyl pyrrolidone) hybrids. / Fujihara, Shinobu; Kitta, Seiki.

In: Chemical Physics Letters, Vol. 397, No. 4-6, 21.10.2004, p. 479-483.

Research output: Contribution to journalArticle

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AB - Photoluminescence (PL) of poly(vinyl pyrrolidone) (PVP) and silica/PVP hybrid films was investigated. The transparent PVP film was found to exhibit bluish PL centered at approximately 440 nm in response to ultraviolet (UV) light excitation. This PL behavior was made good use of in preparing luminescent silica/PVP hybrid films with high thermal stability at temperatures up to 250 °C. Europium-doped hybrid films exhibited white PL upon UV excitation, resulting from mixing of broadband PVP emissions and 5D0 → 7F2 emissions of Eu3+. Emission colors could be finely tuned by changing excitation wavelengths.

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