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Synthesis of Sr2Ta2O7:Eu3+ red phosphor and its luminescence characteristics

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Abstract

A series of novel orange-red emitting tantalate phosphors, Sr2Ta2O7:xEu3+ (0.01 ≤ × ≤ 0.13) were successfully prepared through the solid-state method at high temperature. Under the excitation of 464 nm, Sr2Ta2O7:Eu3+ emits orange-red light at 597 nm. The PL spectra of Sr2Ta2O7:Eu3+ phosphors are ascribed to the 5D0 → 7FJ (J = 0, 1, 2, 3 and 4) transitions of Eu3+ ions. The optimal doping concentration of Eu3+ ions was 9 mol%. The optical bandgap of the host was calculated by ultraviolet-visible diffuse reflection spectra (DRS) with a value of 4.73 eV. The emission intensity of phosphors at 423 K still maintains 92% of that at room temperature, which means the material has excellent thermal stability. The chromaticity coordinates of the Sr2Ta2O7:Eu3+ located in the orange-red region (0.6403, 0.3585). Various results show that Eu3+-doped Sr2Ta2O7 phosphors have great potential in the field of phosphor conversion white light-emitting diodes (pc-WLEDs).

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The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Acknowledgements

The authors acknowledge the financial support from the National Natural Science Foundation of China (Nos. 51972065).

Funding

This work was funded by National Natural Science Foundation of China, Grant No. 51972065, Yihua Hu.

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Authors and Affiliations

  1. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, WaiHuan Xi Road, No. 100, Guangzhou, 510006, China

    Yonglin Chen, Haoyi Wu, Zhenpeng Liu, Jiangyun Wan & Yihua Hu

  2. School of Electronics and Electrical Engineering, Zhaoqing University, Yingbin Avenue, Duanzhou District, Zhaoqing, 526061, Guangdong, China

    Yanmei Li

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Contributions

All authors contributed to the study conception and design. HW and YH propose research ideas to formulate or form overall research goals. Material preparation, data collection and analysis were performed by YC, JW and ZL. The first draft of the manuscript was written by YC. HW and YL revised the first draft of the paper. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Haoyi Wu, Yanmei Li or Yihua Hu.

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Chen, Y., Wu, H., Li, Y. et al. Synthesis of Sr2Ta2O7:Eu3+ red phosphor and its luminescence characteristics. J Mater Sci: Mater Electron 34, 1740 (2023). https://doi.org/10.1007/s10854-023-11187-y

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