Organic fluorescent dyes trapped in silica and silica-titania thin films by the sol-gel method. Photophysical, film and cage properties

David Avnir*, Vered R. Kaufman, Renata Reisfeld

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

386 Scopus citations

Abstract

The sol-gel process is utilized to solve the notorious problem of incorporating an organic dye in an inorganic oxide thin film. Fluorescent thin films are prepared by this low temperature process with the aid of a surface active agent, with good homogeneity and reproducability. A variety of organic fluorescent molecules are embeded either in silica or in silica-titania films. The dye molecules are not leached out by water. Absorption and emission spectra, enhanced photostability, longer lifetimes and energy transfers between the trapped dye molecules are described and discussed in terms of the effects of molecule matrix-isolation on these properties. Potential uses of the special thin films are numerous, e.g., as laser or solar light guides.

Original languageEnglish
Pages (from-to)395-406
Number of pages12
JournalJournal of Non-Crystalline Solids
Volume74
Issue number2-3
DOIs
StatePublished - 1 Nov 1985

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