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<p>This study introduces a novel laser-based phosphor-converted white light source (LPWLS) designed for enhanced efficiency and stability. To address inherent thermal challenges, we have developed a phosphor-silver nanoparticles (P-AgNPs) composite. By integrating AgNPs into a red and green (RG) phosphor mixture, the composite improves thermal conductivity and broadens the device’s optical spectrum. The proposed LPWLS utilizes a blue laser diode to excite the RG-AgNPs composite, generating a broadband emission spectrum that results in a high color rendering index (CRI) of ≥ 85 and a tunable correlated color temperature (CCT). Experimental results demonstrate a significant improvement over traditional YAG:Ce phosphor systems. The tunable CCT allows for versatile applications in residential and commercial lighting, while the enhanced thermal stability of the composite contributes to a longer operational lifespan and lower maintenance costs. The wide-spectrum output closely mimics natural daylight, providing a comfortable and visually pleasing lighting experience. This research advances LPWLS technology, paving the way for sustainable and energy-efficient lighting solutions.</p>

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Engineered optical properties of phosphor-silver nanoparticle composites for high-CRI solid-state lighting

  • 期刊论文

  • 发表日期：

    2026年3月10日

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  • Dheeraj Kumar,
  • Ravendra Kumar Varshney,
  • Dalip Singh Mehta

摘要

This study introduces a novel laser-based phosphor-converted white light source (LPWLS) designed for enhanced efficiency and stability. To address inherent thermal challenges, we have developed a phosphor-silver nanoparticles (P-AgNPs) composite. By integrating AgNPs into a red and green (RG) phosphor mixture, the composite improves thermal conductivity and broadens the device’s optical spectrum. The proposed LPWLS utilizes a blue laser diode to excite the RG-AgNPs composite, generating a broadband emission spectrum that results in a high color rendering index (CRI) of ≥ 85 and a tunable correlated color temperature (CCT). Experimental results demonstrate a significant improvement over traditional YAG:Ce phosphor systems. The tunable CCT allows for versatile applications in residential and commercial lighting, while the enhanced thermal stability of the composite contributes to a longer operational lifespan and lower maintenance costs. The wide-spectrum output closely mimics natural daylight, providing a comfortable and visually pleasing lighting experience. This research advances LPWLS technology, paving the way for sustainable and energy-efficient lighting solutions.