Design of phosphors in glass doped with silver nanocrystals (Sr,Ca)AlSiN ₃ :Eu ²⁺ for sunlight-like lighting excited by violet light chips

Given the distinctive optical scattering and surface plasmon resonance properties of silver nanocrystals, which can effectively manipulate the propagation path of incident light and enhance the local field effect, this study innovatively designed and fabricated a series of violet-excitable phosphor films embedded in (<i>S</i><i>r</i>,<i>C</i><i>a</i>)<i>A</i><i>l</i><i>S</i><i>i</i><i>N</i>₃:<i>E</i><i>u</i>²⁺ glass doped with silver nanocrystals. The prepared phosphor-in-glass composites not only maintain a quantum efficiency comparable to that of the original phosphor material (around 90%) but also demonstrate excellent chemical stability and remarkable resistance to thermal quenching. When excited by a 410 nm violet light chip, through the incorporation of commercial blue and green phosphors, the modulation of full-spectrum warm white LEDs was successfully achieved. These LEDs feature a color rendering index of 91, a correlated color temperature of 5171 K, and a luminous efficacy of 80 lm/W. This research offers what we believe to be a novel strategy for the design of high-performance inorganic fluorescent packaging materials and shows great potential for the development of next-generation, sunlight-like healthy lighting solutions.