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<p>The CaZr₄(PO₄)₆:RE (RE = Sm³⁺, Tb³⁺) phosphors were successfully synthesized via the conventional solid-state reaction method. The structural characteristics were confirmed through X-ray diffraction (XRD), while the luminescence behavior was investigated using photoluminescence (PL) spectroscopy. For Sm³⁺-doped CaZr₄(PO₄)₆, the excitation at 403&#xa0;nm yielded distinct emission peaks at 564, 600, and 647&#xa0;nm, corresponding to the characteristic orange–red transitions of Sm³⁺ ions. In contrast, Tb³⁺-doped CaZr₄(PO₄)₆, under excitation at 378&#xa0;nm, exhibited an intense green emission centered at 545&#xa0;nm along with a relatively weak blue emission at 483&#xa0;nm, arising from the typical 4f–4f transitions of Tb³⁺ ions. The PL results indicate that ultraviolet (UV) excitation is highly effective in activating these phosphors, leading to intense orange–red and green emissions that are well-matched with the emission range of near-ultraviolet (NUV) LED chips. Owing to their efficient luminescent performance and compatibility with NUV excitation sources, CaZr₄(PO₄)₆:RE (Sm³⁺, Tb³⁺) phosphors are promising candidates for applications in eco-friendly solid-state lighting.</p>

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Luminescence properties of CaZr4(PO4)6 : RE (RE = Sm3+, Tb3+) phosphor for ecofriendly lighting application

  • 期刊论文

  • 发表日期：

    2025年10月27日

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  • Sonal P. Tatte,
  • S. A. Fartode,
  • G. C. Mishra,
  • N. S. Dhoble,
  • S. J. Dhoble

摘要

The CaZr₄(PO₄)₆:RE (RE = Sm³⁺, Tb³⁺) phosphors were successfully synthesized via the conventional solid-state reaction method. The structural characteristics were confirmed through X-ray diffraction (XRD), while the luminescence behavior was investigated using photoluminescence (PL) spectroscopy. For Sm³⁺-doped CaZr₄(PO₄)₆, the excitation at 403 nm yielded distinct emission peaks at 564, 600, and 647 nm, corresponding to the characteristic orange–red transitions of Sm³⁺ ions. In contrast, Tb³⁺-doped CaZr₄(PO₄)₆, under excitation at 378 nm, exhibited an intense green emission centered at 545 nm along with a relatively weak blue emission at 483 nm, arising from the typical 4f–4f transitions of Tb³⁺ ions. The PL results indicate that ultraviolet (UV) excitation is highly effective in activating these phosphors, leading to intense orange–red and green emissions that are well-matched with the emission range of near-ultraviolet (NUV) LED chips. Owing to their efficient luminescent performance and compatibility with NUV excitation sources, CaZr₄(PO₄)₆:RE (Sm³⁺, Tb³⁺) phosphors are promising candidates for applications in eco-friendly solid-state lighting.