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Synthesis and luminescence properties of double-perovskite white emitting phosphor Ca3WO6:Dy3+

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Abstract

A series of single-phase Ca3WO6:Dy3+ phosphors were successfully synthesized via a conventional solid state reaction process. X-ray diffraction and photoluminescence spectra were utilized to characterize the structure and luminescence properties of the as-synthesized phosphors. Under 351 nm excitation, the blue emission at 483 nm (4F9/2 → 6H15/2) and yellow emission at 577 nm (4F9/2 → 6H13/2) were observed in the phosphors. The band gap of Ca3WO6 was estimated to be about 3.82 eV from the diffuse reflection spectrum. The decay time values of Ca3WO6:0.04Dy3+ was calculated to be 0.908 ms. The thermal stability of luminescence of Ca3WO6:0.04Dy3+ phosphor was also investigated and the activated energy was deduced to be 0.105 eV, which shows good thermal stability. The Commission Internationale de L’Eclairage chromaticity color coordinates of the phosphors were found to be in the white light region of the chromaticity diagram. The results show that Ca3WO6:Dy3+ can be a promising white emitting phosphor for white LEDs.

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Acknowledgments

This work was supported by Importation and Development of High-Caliber Talents Project of Beijing Municipal Institutions (CIT&TCD201404030), Funding for training talents in Beijing City (No. 2011D005003000012), National Natural Science Foundation of China (Nos. 21576002, 11404013 and 61405003), PXM2015_ 014213_000063, Characteristic research team of Beijing Technology and Business University (No. 19008001076) and Academic Innovation Project Funding of Beijing Technology and Business University.

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Authors and Affiliations

  1. School of Science, Beijing Technology and Business University, Beijing, 100048, China

    Denghui Xu, Zaifa Yang, Jiayue Sun, Xuedong Gao & Jiangnan Du

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  1. Denghui Xu
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  2. Zaifa Yang
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  3. Jiayue Sun
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Correspondence to Denghui Xu.

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Xu, D., Yang, Z., Sun, J. et al. Synthesis and luminescence properties of double-perovskite white emitting phosphor Ca3WO6:Dy3+ . J Mater Sci: Mater Electron 27, 8370–8377 (2016). https://doi.org/10.1007/s10854-016-4848-z

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  • DOI: https://doi.org/10.1007/s10854-016-4848-z

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