STRUCTURE AND LUMINESCENCE OF Bi2Zr2O7:Eu3+,Tb3+ RED PHOSPHORS FOR WHITE LIGHT-EMITTING DIODES

Authors

  • Nguyen Van Hai Faculty of Chemistry, Hanoi National University of Education, Hanoi city, Vietnam
  • Vu Thi Ngoc Linh Faculty of Chemistry, Hanoi National University of Education, Hanoi city, Vietnam
  • Ho Van Cuu FET Faculty of Engineering and Technology, Sai Gon University, Ho Chi Minh city, Vietnam
  • Nguyen Viet Long FET Faculty of Engineering and Technology, Sai Gon University, Ho Chi Minh city, Vietnam

DOI:

https://doi.org/10.18173/2354-1059.2025-0026

Keywords:

Bi\(_2\)Zr\(_2\)O\(_7\), energy transfer, Eu\(^3\)\(^+\) and Tb\(^3\)\(^+\), luminescence, red phosphor

Abstract

In this study, Eu3+ and Tb3+ co-doped Bi2Zr2O7 (BZO) pyrochlore phosphors were successfully synthesized via a combustion method at 600°C. The crystal structure, elemental composition, morphology, luminescent characteristics, and energy transfer behavior were systematically investigated. Powder X-ray diffraction (XRD) analysis confirmed that all synthesized samples exhibited a pure single-phase pyrochlore structure, with Eu3+ and Tb3+ ions efficiently incorporated into the host lattice. Under blue light excitation at 466 nm, BZO:Eu3+,Tb3+ phosphors exhibited relatively strong red emission. Efficient energy transfer from Tb³⁺ to Eu³⁺ was observed, leading to a significant enhancement in red luminescence. Furthermore, the obtained phosphors demonstrated color purities approaching 90%. These results suggest that Tb3+ ions effectively act as sensitizers to Eu3+, and the new kinds of BZO:Eu3+,Tb3+ phosphors hold great potential for application in blue-excited white light-emitting diodes (WLEDs).

References

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Published

30-06-2025

Issue

Volume 70, Issue 2, 2025: Natural Sciences

Section

Articles

How to Cite

Van Hai, N., Thi Ngoc Linh, V., Van Cuu, H., & Viet Long, N. (2025). STRUCTURE AND LUMINESCENCE OF Bi2Zr2O7:Eu3+,Tb3+ RED PHOSPHORS FOR WHITE LIGHT-EMITTING DIODES. Journal of Science Natural Science, 70(2), 111-119. https://doi.org/10.18173/2354-1059.2025-0026