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Enhancement of Photoluminescence and Color Purity of CaTiO3:Eu Phosphor by Li Doping

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High color purity red phosphors of Ca1−3/2x Eu x TiO3 and Ca1−2x Eu x Li x TiO3 (0 <  0.3) are synthesized via a solid‐state reaction method. The red emission photoluminescence intensity and color purity are enhanced by the incorporation of Li+ into CaTiO3:Eu3+. The Li+ doping increases the emission probability from 5D0 state, increases photoluminescence intensity by 1.6 times, increases color purity to 92.1%, and shortens the decay time. With increasing Eu3+ and Li+ content, the color coordinates approach the ideal red chromaticity values, coming closer than commercial Y2O2S:Eu3+ red phosphor.
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Document Type: Research Article

Publication date: April 1, 2012

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