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<p>With the growing demand for comfortable lighting, full-spectrum illumination has become a current research hotspot. To address the detrimental impacts of blue light, recent studies focus on the integration of UV-LED excitation with cyan light supplementation, thereby achieving spectrally balanced illumination while minimizing photobiological risks. In this paper, a series of Ca<sub>3</sub>Zr<sub>2-y</sub>Hf<sub>y</sub>SiGa<sub>2</sub>O<sub>12</sub>: 0.04Ce<sup>3+</sup> (<i>y</i> = 0, 0.5, 1.0, 1.5, 2.0) phosphors with Zr/Hf substitution were synthesized using the high-temperature solid-state method. The structure, morphology, luminescent properties, band gap, and temperature characteristics were systematically characterized. The results show that the introduction of Hf significantly improved the crystallinity and luminous intensity of the phosphor, with the maximum luminous intensity increasing 1.9 times. Diffuse reflectance spectra revealed that the band gap remained largely unchanged during the Hf substitution process. Furthermore, by mixing this phosphor with yellow and red phosphors and encapsulating it in a 400-nm UV-LED chip, a white PC-LED was successfully prepared, effectively reducing harmful blue light leakage. This phosphor demonstrates promising potential for full-spectrum illumination.</p>

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Cation replacement realizes cyan phosphor based on full spectral illumination

  • 期刊论文

  • 发表日期：

    2025年6月19日

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  • Jinyan Niu,
  • Zhang Chen,
  • Shuai He,
  • Xiaobo Yu,
  • Qian Guan,
  • He Li,
  • Chen Cheng,
  • LuoMeng Chao,
  • Jun Qiao,
  • YongHong Ma

摘要

With the growing demand for comfortable lighting, full-spectrum illumination has become a current research hotspot. To address the detrimental impacts of blue light, recent studies focus on the integration of UV-LED excitation with cyan light supplementation, thereby achieving spectrally balanced illumination while minimizing photobiological risks. In this paper, a series of Ca3Zr2-yHfySiGa2O12: 0.04Ce3+ (y = 0, 0.5, 1.0, 1.5, 2.0) phosphors with Zr/Hf substitution were synthesized using the high-temperature solid-state method. The structure, morphology, luminescent properties, band gap, and temperature characteristics were systematically characterized. The results show that the introduction of Hf significantly improved the crystallinity and luminous intensity of the phosphor, with the maximum luminous intensity increasing 1.9 times. Diffuse reflectance spectra revealed that the band gap remained largely unchanged during the Hf substitution process. Furthermore, by mixing this phosphor with yellow and red phosphors and encapsulating it in a 400-nm UV-LED chip, a white PC-LED was successfully prepared, effectively reducing harmful blue light leakage. This phosphor demonstrates promising potential for full-spectrum illumination.