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Spectroscopic investigation of novel yellow-emitting Li3Bi3Te2O12:Dy3+ phosphors with high thermal stability for w-LEDs applications

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Abstract

A series of Li3Bi3Te2O12:xDy3+ (x = 0.01, 0.02, 0.05, 0.10, 0.15, 0.20, and 0.30 mol) samples were successfully prepared by high-temperature sintering method. The phase purities of the Li3Bi3Te2O12:Dy3+ phosphors were verified by powder X-ray diffraction (XRD) and revealed as single-phase structure. Under 386-nm excitation, the Dy3+-doped Li3Bi3Te2O12 phosphors show three emission peaks are located at 488, 579, and 673 nm, which are ascribed to the typical transitions from 4F9/2 to 6HJ/2 (J = 15, 13, and 11), respectively. The effects of concentration on luminescence properties indicate that the optimal doping concentration was x = 0.02 mol. The prepared Li3Bi3Te2O12:0.02Dy3+ phosphor has the excellent thermal stability with high-temperature quenching temperature (T0.5 > 480 K) and high activation energy (Ea = 0.38 eV). The shift of CIE chromaticity coordinates of Li3Bi3Te2O12:0.02Dy3+ phosphor with concentrations are Δx = 0.018 and Δy = 0.020. Thus, Li3Bi3Te2O12:Dy3+ phosphors have potential application for white light-emitting diodes (w-LEDs).

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All data included in this study are available upon request by contact with the corresponding author.

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Funding

This work was supported by Natural Science Foundation of Guangdong Province of China (2020A1515010106).

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Author notes

  1. Tuckyun Cheang, Hongyan Zhou, and Weihao Lin have contributed equally to this work.

Authors and Affiliations

  1. Department of Neurosurgery, The First Affiliated Hospital/School of Clinical Medicine of Guangdong Pharmaceutical University, Guangdong, 510080, People’s Republic of China

    Tuckyun Cheang

  2. Department of Neurology, The First Affiliated Hospital of Sun Yat-Sen University, Guangdong, 510080, People’s Republic of China

    Hongyan Zhou

  3. Department of Thyroid and Breast Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangdong, 510080, People’s Republic of China

    Weihao Lin

  4. Central Lab, The First Affiliated Hospital/School of Clinical Medicine of Guangdong Pharmaceutical University, Guangdong, 510080, People’s Republic of China

    Yayun Wang & Xiaonian Chang

  5. Department of General Surgery II, The First Affiliated Hospital/School of Clinical Medicine of Guangdong Pharmaceutical University, Guangdong, 510080, People’s Republic of China

    Dan Chen

  6. Department of Breast Care Surgery, The First Affiliated Hospital/School of Clinical Medicine of Guangdong Pharmaceutical University, Guangdong, 510080, People’s Republic of China

    Yongcheng Zhang

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  1. Tuckyun Cheang
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Contributions

All authors contributed to the study conception and design. TC and HZ were responsible for acquisition, analysis, and interpretation of data. WL were responsible for investigation and visualization. YW, DC, and XC were in charge of formal analysis and supervision. Writing, reviewing, and editing of the manuscript and verification were supported by TC. Fund acquisition were supported by YZ. All authors read and approved the final manuscript.

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Correspondence to Yongcheng Zhang.

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Cheang, T., Zhou, H., Lin, W. et al. Spectroscopic investigation of novel yellow-emitting Li3Bi3Te2O12:Dy3+ phosphors with high thermal stability for w-LEDs applications. J Mater Sci: Mater Electron 33, 22508–22517 (2022). https://doi.org/10.1007/s10854-022-09030-x

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