Laser precipitation of Eu and Yb codoped CaF2 nanocrystals on the surface of glass and emission characteristics

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We precipitated spatially selective Eu/Yb doped CaF2 nanocrystals on the surface of glass by CO2 laser irradiation. Because of low phonon energy of CaF2, we observed several times enhancements in down-shift emission under 365 nm excitation and upconversion emission under 980 nm excitation. Our approach to produce glass-ceramics does not require an electric furnace for thermal diffusion of composite materials in glass. It needs only a few minutes instead of several hours to precipitate nanocrystals in this study. We controlled CO2 laser power Glass-ceramics was characterized by using micro-X-ray diffraction (-XRD), and the mean crystal size was ~10 nm. Confocal fluorescence microscope analysis revealed the depth of spatially distributed volume of nanocrystals near the surface.

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Journal: TechConnect Briefs
Volume: 1, Advanced Materials: TechConnect Briefs 2016
Published: May 22, 2016
Pages: 213 - 216
Industry sector: Advanced Materials & Manufacturing
Topic: Advanced Materials for Engineering Applications
ISBN: 978-0-9975-1170-3