Novel color converters for full-spectrum high-power LED/LD: Patterned phosphor in glass film – ceramic composite

Addressing thermal management and color quality challenges in solid-state lighting, this work pioneers a color-converter based on patterned phosphor-in-glass film (PiGF) sintered on a YAG:Ce transparent ceramic (TC). The composite alternating β-SiAlON:Eu and (Sr,Ca)AlSiN 3 :Eu PiGF striped on YAG:Ce TC exhibited exceptional photothermal performance: thermal conductivity reached 8.32 W/(m·K) and only 11.6 % luminescence intensity loss at 150 °C. Under a 450 nm LD excitation with the laser spot size of 850 μm, beam expansion ratios were 24 % for the YAG:0.35 at%Ce, and 84.11 % for the green-red PiGF (2:1 ratio). Combined with a 60 W blue LED chip, the color-converter realized a nature-white-light emission with LF of 3705 lm, CCT of 3852 K, and CRI of 91, respectively. By combining the converter with a 12 W blue LD, the obtained LE, CRI and CCT were 163 lm/W, 90.1 and 5092 K, respectively. The composite shows great promise as a novel color-converter for high-power LED/LD lighting applications.