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<p>The pioneering study reveals the transformative power of co-doping in enhancing phosphor performance, focusing on the development of a cutting-edge white phosphor: SrCeO<sub>3</sub>:0.02Sm<sup>3+</sup> co-doped with Y<sup>3+</sup> (0–2&#xa0;wt%) for high-CRI white LED applications. These innovative perovskites were synthesized using a low-temperature fuel-excess gel combustion technique, with citric acid as the fuel and ammonium nitrate as an additional oxidizer. By examining the impact of Y<sup>3+</sup> sensitization on the crystalline phases, morphology, elemental composition, band gap energy, and luminescence properties, the study discovered that orthorhombic SrCeO₃:0.02Sm<sup>3+</sup>: Y<sup>3+</sup> perovskites exhibit exceptional crystallinity and peak luminescence at 1.5&#xa0;wt% Y<sup>3+</sup>. The CIE color diagram confirmed their bright white light emission across all samples. This breakthrough positions nano-perovskite SrCe<sub>0.965</sub>Sm<sub>0.02</sub>O<sub>3</sub>:1.5&#xa0;wt% Y<sup>3+</sup> as a top candidate for direct phosphor coatings on near-UV LED chips, and its practical utility promises significant advancements in energy-efficient lighting technology.</p>

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Thermally stable Sm3+ doped SrCeO3 single-phase white phosphor with Y3+ sensitization for fabricating wLEDs

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月7日

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  • C. K. Shilpa,
  • S. V. Jasira,
  • V. P. Veena,
  • S. V. Sajith,
  • A. M. Huda Thasneem,
  • K. Greeshma,
  • S. S. Ancy,
  • Sakthivel Pandurengan,
  • K. M. Nissamudeen

摘要

The pioneering study reveals the transformative power of co-doping in enhancing phosphor performance, focusing on the development of a cutting-edge white phosphor: SrCeO3:0.02Sm3+ co-doped with Y3+ (0–2 wt%) for high-CRI white LED applications. These innovative perovskites were synthesized using a low-temperature fuel-excess gel combustion technique, with citric acid as the fuel and ammonium nitrate as an additional oxidizer. By examining the impact of Y3+ sensitization on the crystalline phases, morphology, elemental composition, band gap energy, and luminescence properties, the study discovered that orthorhombic SrCeO₃:0.02Sm3+: Y3+ perovskites exhibit exceptional crystallinity and peak luminescence at 1.5 wt% Y3+. The CIE color diagram confirmed their bright white light emission across all samples. This breakthrough positions nano-perovskite SrCe0.965Sm0.02O3:1.5 wt% Y3+ as a top candidate for direct phosphor coatings on near-UV LED chips, and its practical utility promises significant advancements in energy-efficient lighting technology.