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<p>LiGe<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub>: Cr<sup>3+</sup> near-infrared phosphor samples were prepared using high-temperature solid-state method and the corresponding PC-LED devices were prepared. Detailed research was conducted on the photoluminescence characteristics of the samples and the performance of PC-LEDs. Under the excitation of 442 nm blue light, the phosphor obtained by calcination at 1 000 °C for 4 h exhibited an emission peak at 778 nm in the broadband near-infrared spectrum. The excitation peak of LiGe<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub>: Cr<sup>3+</sup> underwent the energy level transitions, <sup>4</sup>A<sub>2</sub>(<sup>4</sup>F) → <sup>4</sup>T<sub>1</sub>(<sup>4</sup>P) and <sup>4</sup>A<sub>2</sub>(<sup>4</sup>F) → <sup>4</sup>T<sub>1</sub>(<sup>4</sup>F), while the emission peak underwent the energy level transition, <sup>4</sup>T<sub>2</sub>(<sup>4</sup>F) → <sup>4</sup>A<sub>2</sub>(<sup>4</sup>F). By coating the phosphor on the surface of the InGaN blue-light chip, The near-infrared PC-LED was prepared, and a near-infrared LED light source with broadband emission was obtained. At a driving current of 60 mA, the near-infrared light radiation power was 7 mW. The experimental results indicate that LiGe<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub>: Cr<sup>3+</sup> near-infrared phosphor can be used to prepare broadband near-infrared LED light sources based on blue-light chips, which has intriguing applications in near-infrared spectroscopy.</p>

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Preparation and Performance Study of LiGe2(PO4)3:Cr3+ Near-infrared Phosphor Excited by Blue-light LED

  • 期刊论文

  • 发表日期：

    2025年7月24日

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  • Luyao Xu,
  • Zhao Li,
  • Yunzheng Wang,
  • Hongbo Ji,
  • Yanan Wang,
  • Kunyao Wu

摘要

LiGe2(PO4)3: Cr3+ near-infrared phosphor samples were prepared using high-temperature solid-state method and the corresponding PC-LED devices were prepared. Detailed research was conducted on the photoluminescence characteristics of the samples and the performance of PC-LEDs. Under the excitation of 442 nm blue light, the phosphor obtained by calcination at 1 000 °C for 4 h exhibited an emission peak at 778 nm in the broadband near-infrared spectrum. The excitation peak of LiGe2(PO4)3: Cr3+ underwent the energy level transitions, 4A2(4F) → 4T1(4P) and 4A2(4F) → 4T1(4F), while the emission peak underwent the energy level transition, 4T2(4F) → 4A2(4F). By coating the phosphor on the surface of the InGaN blue-light chip, The near-infrared PC-LED was prepared, and a near-infrared LED light source with broadband emission was obtained. At a driving current of 60 mA, the near-infrared light radiation power was 7 mW. The experimental results indicate that LiGe2(PO4)3: Cr3+ near-infrared phosphor can be used to prepare broadband near-infrared LED light sources based on blue-light chips, which has intriguing applications in near-infrared spectroscopy.