1. Influence of Ba2+-doping on structural and luminescence properties of Sr2SiO4:Eu2+ phosphors
- Author
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Pan, Zhengwei, He, Hong, Fu, Renli, Agathopoulos, Simeon, and Song, Xiufeng
- Subjects
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BARIUM , *SEMICONDUCTOR doping , *STRUCTURAL analysis (Science) , *LUMINESCENCE , *STRONTIUM , *PHOSPHORS , *SPECTRUM analysis , *SOLID state chemistry , *POWDER metallurgy , *MICROSTRUCTURE - Abstract
Abstract: Ba2+-doped Sr2SiO4:Eu2+ phosphors were synthesized with the high-temperature solid-state reaction technique. The experimental results, summarized in the successful production of a single-phase powder with fine microstructure of spherical particles with smooth surface, suggest that Ba2+-doping favors the stabilization of α′-Sr2SiO4. Rietveld refinement of X-ray diffractograms suggests that Ba2+ and Eu2+ ions occupy the sites of Sr2+ in the lattice of α′-Sr2SiO4. The produced phosphors show two intense emission bands at green and yellow regions of spectrum, originated from Eu2+ ions accommodated at two different sites in the host crystal, whose peaks depend on the concentrations of Ba2+ and Eu2+. Intense and broad excitation spectra extend from ultraviolet to the blue region. [Copyright &y& Elsevier]
- Published
- 2009
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