2011•Unpublished venueRequires access

Luminescence Properties of Ca Doped Ba_2Al_2Si_(10)N_(14)O_4∶Eu~(2+) Phosphor

Xie Wen

Abstract

The Ca doped Ba2Al2Si10N14O4∶Eu2+ phosphors were prepared by a solid-state reaction method.From XRD results,only the single-phase region was found under 20% Ca content.Based on parameters calculated by Unitcell,the crystal lattice shrinks after the Ca incorporation because of the smaller radius of Ca2+.The photoluminescence (PL) properties of Ca doped Ba2Al2Si10N14O4∶Eu2+ phosphors were investigated.The excitation spectra cover the UV-Visible spectral region from 250～400 nm.The red shifts of excitation and emission spectra are from 300 nm to 320nm and 520 nm to 548 nm,respectively.The emission intensity and wavelength of Ca doped Ba2Al2Si10N14O4∶Eu2+ phosphors as a function of Eu2 + concentration were also studied.The CIE 1931 chromaticity of Ca doped Ba2Al2Si10N14O4∶Eu2+ phosphors could be adjusted over a wide range concentration of Ca2+and Eu2+.

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Key concepts: Phosphor, Chromaticity, Photoluminescence, Doping, Analytical Chemistry (journal), Luminescence, Emission spectrum, Materials science