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<p>For most Mn<sup>4+</sup>-aliovalent-doped A<sub>2</sub>BB’O<sub>6</sub> phosphors, defects formed during doping act as non-radiative quenching centers, strengthening phonon-electron interactions and promoting non-radiative transitions. This study focuses on Mn<sup>4+</sup>-activated double perovskite luminescent materials via isovalent doping. Equimolar Zr<sup>4+</sup> and W<sup>6+</sup> fully replace pentavalent B’ sites in Sr<sub>2</sub>YB’O<sub>6</sub>, creating isovalent doping sites for Mn<sup>4</sup>⁺. Results show the as-synthesized Sr<sub>2</sub>YZr<sub>0.5</sub>W<sub>0.5</sub>O<sub>6</sub>:Mn<sup>4+</sup> (SYZW:Mn<sup>4+</sup>) has an internal quantum efficiency (IQE) of 57.6%, and it retains 82% of its room-temperature emission intensity at 423&#xa0;K. Quantitative analysis verifies that nonradiative energy transfer in SYZW:Mn<sup>4+</sup> is dominated by dipole–dipole interaction, and the thermal quenching activation energy is determined to be 0.448&#xa0;eV. In plant growth lighting tests, the high-efficiency SYZW:Mn<sup>4+</sup> phosphor effectively supplements 688&#xa0;nm red light for plant photosynthesis. This work enhances the performance of Mn<sup>4+</sup>-activated double perovskite red phosphors through composition optimization, providing an effective modification strategy for designing similar material systems.</p>

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Structure regulation of transition metal ion-activated double perovskite phosphors: performance optimization of Sr2YZr0.5W0.5O6:Mn4+

  • 期刊论文

  • 发表日期：

    2026年6月16日

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  • Bingjie Han,
  • Xin Zeng,
  • Hongyu Liu,
  • Yujie Wei,
  • Wei Li,
  • Zihua Liu,
  • Lei Shi,
  • Yu Liu

摘要

For most Mn4+-aliovalent-doped A2BB’O6 phosphors, defects formed during doping act as non-radiative quenching centers, strengthening phonon-electron interactions and promoting non-radiative transitions. This study focuses on Mn4+-activated double perovskite luminescent materials via isovalent doping. Equimolar Zr4+ and W6+ fully replace pentavalent B’ sites in Sr2YB’O6, creating isovalent doping sites for Mn4⁺. Results show the as-synthesized Sr2YZr0.5W0.5O6:Mn4+ (SYZW:Mn4+) has an internal quantum efficiency (IQE) of 57.6%, and it retains 82% of its room-temperature emission intensity at 423 K. Quantitative analysis verifies that nonradiative energy transfer in SYZW:Mn4+ is dominated by dipole–dipole interaction, and the thermal quenching activation energy is determined to be 0.448 eV. In plant growth lighting tests, the high-efficiency SYZW:Mn4+ phosphor effectively supplements 688 nm red light for plant photosynthesis. This work enhances the performance of Mn4+-activated double perovskite red phosphors through composition optimization, providing an effective modification strategy for designing similar material systems.