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Modulation and Enhancement of Red Luminescence in Ca2GdSbO6: Eu3+ Phosphor by Co-Doping with Bi3+

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Abstract

The double perovskite structure of Ca2GdSbO6 as a fluorescent phosphor matrix material possesses a stable structure, making it an excellent candidate for a matrix material. In this study, single-doped Ca2GdSbO6: Eu3+ fluorescent phosphors and Bi3+ sensitized Ca2GdSbO6: Eu3+, Bi3+ fluorescent phosphor materials were synthesized using the high-temperature solid-state method. The luminescence of this phosphor is based on the 5D0→4F2 transition emission of Eu3+ ions, which occurs at 612 nm. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) spectra, high-temperature fluorescence spectra, and fluorescence decay lifetimes to study the phase structure, optical properties, crystal structure, and chemical purity of the samples. The performance of the single-doped phosphor was significantly improved by the addition of Bi3+ sensitizer. The luminescence intensity increased by nearly 100% compared to Ca2GdSbO6: Eu3+ phosphor, with a quantum efficiency increase of 124%. The thermal quenching activation energy was found to be 0.299 eV, and the luminescence intensity remained at 70.3% of room temperature at 453 K. These results indicate that the co-doping of Bi3+ has a modulation and enhancement effect on the luminescence of Ca2GdSbO6: Eu3+ red phosphor, showing great potential for application in near-ultraviolet-excited white LED devices.

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No datasets were generated or analysed during the current study.

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Acknowledgements

This work was supported by The University Industry-University-Research Joint Innovation Project of Fujian Province (No.2023H6038); The Postgraduate Science and Technology Innovation Programme Projects of Xiamen University of Technology (No.YKJCX2023086).

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Authors and Affiliations

  1. School of Opto-electronic and Communication Engineering, Xiamen University of Technology, Xiamen, 361024, Fujian, China

    Jing Li, Junhuang Hong, Yingchao Xu, Yue Liu & Haoshuang Fan

  2. Fujian Provincial Key Laboratory of Opto-electronics Technology and Devices, Xiamen, 361024, Fujian, China

    Yingchao Xu

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  1. Jing Li
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  4. Yue Liu
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Contributions

Li.: Conceptualization, Investigation, Experiment, Writing-original draft.Hong.: Investigation, Experiment. Xu.: Methodology, Data curation, Supervision. Liu.: Methodology, Data curation, Supervision. Fan.: Investigation, Experiment.All authors read and approved the final manuscript.

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Correspondence to Yingchao Xu.

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Li, J., Hong, J., Xu, Y. et al. Modulation and Enhancement of Red Luminescence in Ca2GdSbO6: Eu3+ Phosphor by Co-Doping with Bi3+. J Fluoresc (2024). https://doi.org/10.1007/s10895-024-03731-8

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