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Luminescent properties of Li2CaSiO4:Eu2+ phosphor

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Abstract

Li2CaSiO4:Eu2+ phosphors with single phase were successfully synthesized by the solid state reaction method and their photoluminescence properties were studied. The experimental results on Li2CaSiO4:Eu2+, summarized in effective absorption and excitation in the ultra-violet region, strong emission in the blue spectrum and the CIE Chromaticity coordinate (0.10, 0.20), indicate this phosphor has great potential in ultra-violet chip pumped white LEDs. A comparative investigation of the emission intensity suggests that Li2CaSiO4:Eu2+ has the best performance with Eu2+ concentration of 1% and excitation of 375 nm. Compound phosphors of Li2CaSiO4:Eu2+ and Li2SrSiO4:Eu2+ show two emission bands in the blue and yellow region. With the molar ratio of Li2CaSiO4:Eu2+ to Li2SrSiO4:Eu2+ being 1:1 and excitation of 390 nm, the CIE Chromaticity coordinate was tuned to be (0.32, 0.36), which is close to that of natural white light, indicating this may become blue phosphor candidate for ultra-violet chip pumped and multi-phosphors converted white LEDs.

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Acknowledgment

Technical support from the Education Department of Anhui Province (TD200701, P.R. China) and assistance from the Eco-materials and Renewable Energy Research Center of the National Laboratory of Solid State Microstructures of Nanjing University (P.R. China) is gratefully acknowledged.

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  1. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, People’s Republic of China

    Hong He, Renli Fu, Fengjiao Qian & Xiufeng Song

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  1. Hong He
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  2. Renli Fu
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  3. Fengjiao Qian
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  4. Xiufeng Song
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Correspondence to Renli Fu.

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He, H., Fu, R., Qian, F. et al. Luminescent properties of Li2CaSiO4:Eu2+ phosphor. J Mater Sci: Mater Electron 23, 599–604 (2012). https://doi.org/10.1007/s10854-011-0447-1

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