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Tunable Emission and Energy Transfer of the Novel KY1−x(MoO4)2−y(WO4)y:xLn3+ (Ln3+ = Dy3+, Eu3+, and Tm3+) Single-phase White Luminescence Phosphor for White LEDs

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Abstract

The phosphors of KY1−x(MoO4)2−y(WO4)y:xLn3+ (Ln3+ = Tm3+, Dy3+, Eu3+) were synthesized by using a sol-gel method. Then, the crystal structure, luminescence properties, energy transfer, and white emission of the prepared materials were researched. The molar ratio of the anion group on the photoluminescence(PL) emission and excitation intensity were investigated, revealing that the optimum intensity could be obtained by using = 3:1. The optimal Dy3+ doping concentration of KY(MoO4)1.5(WO4)0.5 was obtained. In addition, the color-tunable emissions of Dy3+/Eu3+-codoped KY(MoO4)1.5(WO4)0.5 phosphors were observed because of the effective energy transfer (ET) from Dy3+ to Eu3+ ions. Finally, by doping appropriate concentrations of Tm3+, Dy3+, and Eu3+ and different concentrations of (WO4)2−, white light emitting phosphors KY0.92(WO4)2:0.01Tm3+.0.06Dy3+, 0.01Eu3+ with excellent color-rending properties were obtained. The chromaticity coordinate was calculated as (x = 0.3238, y = 0.3173), closing to the artificial daylight (D65, x = 0.313, y = 0.329) illuminant, and which indicates the potential application of near ultraviolet White light-emitting diodes (WLEDs).

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Authors and Affiliations

  1. Department of Oncology, The Third People’s Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, 610031, China

    Hai Zhu  (朱海)

  2. Medical Research Center, The Third People’s Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, 610031, China

    Hai Zhu  (朱海)

  3. National Engineering Research Center for Biomaterials, College of Biomedical Materials, Sichuan University, Chengdu, 610064, China

    Bin He

  4. College of Materials Science and Engineering, Sichuan University, Chengd, 610064, China

    Weigang Huang  (黄维刚)

Authors
  1. Hai Zhu  (朱海)
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  2. Bin He
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  3. Weigang Huang  (黄维刚)
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Correspondence to Weigang Huang  (黄维刚).

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Zhu, H., He, B. & Huang, W. Tunable Emission and Energy Transfer of the Novel KY1−x(MoO4)2−y(WO4)y:xLn3+ (Ln3+ = Dy3+, Eu3+, and Tm3+) Single-phase White Luminescence Phosphor for White LEDs. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 38, 1278–1286 (2023). https://doi.org/10.1007/s11595-023-2820-3

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  • DOI: https://doi.org/10.1007/s11595-023-2820-3

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