Photoluminescence properties of emission-tunable Ca9Y(PO4)7: Tm,Dy phosphor for white light emitting diodes |
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| Authors: | Xiaoyong Wu Yujun Liang Rui Chen Mingyu Liu Zheng Cheng |
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| Affiliation: | 1. Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan 430074, People''s Republic of China;2. Faculty of Materials Science and Chemical Engineering, China University of Geosciences, Wuhan 430074, People''s Republic of China |
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| Abstract: | A white-emitting Ca9Y(PO4)7: Tm3+, Dy3+ phosphor has been successfully prepared by conventional high-temperature solid-state reaction. X-ray diffraction (XRD) and fluorescence spectrophotometer were used to characterize the as-synthesized phosphors. The excitation and emission spectra show that all the Tm3+ and Dy3+ co-doped Ca9Y(PO4)7 samples can be effectively excited by UV light and then emit blue and yellow light simultaneously. Furthermore, the emission and color coordinate of as-obtained samples pumped by 365 nm are able to be adjusted around white light by varying the doping concentrations of Tm3+ and Dy3+. So, the as-fabricated single-composition Ca9Y(PO4)7: Tm3+, Dy3+ phosphor will have a promising application in the area of white light emitting diodes. |
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| Keywords: | Optical materials Chemical synthesis Photoluminescence spectroscopy Optical properties |
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