Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7920947 | Journal of Physics and Chemistry of Solids | 2015 | 28 Pages |
Abstract
Co-doping of the (50âx)CaO-xCaF2-50P2O5 (x=0,10, and 20) ternary glass system with CuO and SnO has been realized by the melt-quenching technique with the purpose of investigating on material photoluminescence (PL). The glasses display tunable luminescence by variation of excitation wavelength in connection with the distinct excitation/emission properties of Cu+ ions and Sn centers. Substitution of CaO by CaF2 appeared to support the Cu+ luminescence process. Analyses of emission decay dynamics suggest that both luminescent species exist primarily coordinated to oxygen atoms in the oxyfluorophosphate hosts. Further, the effect of temperature on Cu+ PL was evaluated from room temperature to 300 °C. An increase in the activation energy for the thermal quenching of Cu+ PL was observed upon the substitution of oxygen by fluorine ions. Accordingly, the Cu+-doped oxyfluorophosphate matrix shows potential as thermally-stable glass for optical device applications (e.g. lighting, solar cells).
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Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
José A. Jiménez,