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<p>Laser phosphor display (LPD) technology has attained considerable attention due to its high brightness, wide-gamut, and non-speckle characters. However, it is challenging to develop laser-resistant bulk luminescent materials with narrow-band emissions for LPD applications. Herein, we present a general strategy to fabricate stable phosphor-glass composites (PGCs) containing commercial red-emitting K<sub>2</sub>SiF<sub>6</sub>:Mn<sup>4+</sup> (KSF:Mn<sup>4+</sup>) and green-emitting <i>β</i>-SiAlON:Eu<sup>2+</sup> with high internal quantum efficiencies of 94.6% and 87.8%. Thereupon, “phosphor wheels” of the two PGCs achieve high luminous flux and efficiency for KSF:Mn-PGC (684 lm, 21 lm W<sup>−1</sup> mm<sup>−1</sup>) and <i>β</i>-SiAlON:Eu-PGC (4770 lm, 172 lm W<sup>−1</sup> mm<sup>−1</sup>), respectively, by mitigating thermal accumulation. Finally, we integrate these two PGCs into a patterned phosphor wheel, which covers 125% of the Rec. 709 standard, far exceeding that of the present YAG:Ce-based laser light sources (103%). Our work paves the way for adapting commercial phosphors in bulk PGC materials to improve their stability and further promote LPD development and new types of display applications.</p>

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Narrow-band green/red-emitting glass composites enabling highly stable patterned wheel for laser phosphor display

  • 期刊论文

  • 发表日期：

    2025年5月13日

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  • Yuhang Kuang,
  • Weibin Chen,
  • Yuzhen Wang,
  • Yongsheng Sun,
  • Jiance Jin,
  • Zhiguo Xia

摘要

Laser phosphor display (LPD) technology has attained considerable attention due to its high brightness, wide-gamut, and non-speckle characters. However, it is challenging to develop laser-resistant bulk luminescent materials with narrow-band emissions for LPD applications. Herein, we present a general strategy to fabricate stable phosphor-glass composites (PGCs) containing commercial red-emitting K2SiF6:Mn4+ (KSF:Mn4+) and green-emitting β-SiAlON:Eu2+ with high internal quantum efficiencies of 94.6% and 87.8%. Thereupon, “phosphor wheels” of the two PGCs achieve high luminous flux and efficiency for KSF:Mn-PGC (684 lm, 21 lm W−1 mm−1) and β-SiAlON:Eu-PGC (4770 lm, 172 lm W−1 mm−1), respectively, by mitigating thermal accumulation. Finally, we integrate these two PGCs into a patterned phosphor wheel, which covers 125% of the Rec. 709 standard, far exceeding that of the present YAG:Ce-based laser light sources (103%). Our work paves the way for adapting commercial phosphors in bulk PGC materials to improve their stability and further promote LPD development and new types of display applications.