Shih Hsing-Kun, Liu Chun-Nien, Cheng Wei-Chih, Cheng Wood-Hi
Opt Express. 2020 Sep 14;28(19):28218-28225. doi: 10.1364/OE.403410.
High color rendering index (CRI) and wide correlated color temperatures (CCTs) white LEDs (WLEDs) employing CaAlSiN: Eu and LuAlO: Ce co-doped phosphor-in-glass (PiG) are demonstrated. Through fabrication using a low sintering temperature of 620°C to minimize inter-diffusion between the red phosphor and glass, and adjusting thickness of 0.5-0.7 mm to obtain the chromaticity tailorable co-doped PiG, the WLEDs exhibit high CRI of 94 and wide CCTs of 3900 K to 5300 K. This CRI is the highest yet reported for the co-doped PiG. The proposed of the co-doped PiG with good thermal stability fabricated by using a low sintering temperature may provide a novel technique to achieve high-performance WLEDs with high CRI for use in many high-quality of indoor lighting applications, especially in color inspection, clinical inspection, and gallery lighting.
展示了采用CaAlSiN:Eu和LuAlO:Ce共掺杂玻璃中磷光体（PiG）的高显色指数（CRI）和宽相关色温（CCT）的白光发光二极管（WLED）。通过在620°C的低温烧结温度下进行制造，以尽量减少红色磷光体与玻璃之间的相互扩散，并将厚度调整为0.5 - 0.7 mm以获得可定制色度的共掺杂PiG，该WLED表现出94的高CRI和3900 K至5300 K的宽CCT。这是迄今报道的共掺杂PiG的最高CRI。所提出的通过低温烧结温度制造的具有良好热稳定性的共掺杂PiG，可能提供一种新技术，以实现用于许多高质量室内照明应用（特别是颜色检测、临床检查和画廊照明）的具有高CRI的高性能WLED。
