Performance enhancement of high-temperature glass-based phosphor-converted white light-emitting diodes employing SiO_2

摘要

It was reported that sol-gel processed SiO_2-coating effects of Ce~(3+): YAG phosphor on and thermal reliability enhancements in terms of quantum efficiency and optical characteristics. This study found improved light extraction efficiencies of glass phosphor, and increased quantum efficiency 3.95% of SGCeYDG in comparison to un-coated CeYDLTG. In the thermal reliability tests, Lumen degradation and chromaticity shift(AE)in the SGCeYDG thermally agd at 150, 250, 350, and 450℃, respectively, are also presented and compared with those of CeYDG. The results clearly demonstrated that the SGCeYDG exhibited better thermal stability on lumen degradation, and chromaticity shift than CeYDG's. The navel high performance thermal-stable glass has been essentially critical to the application areas of LED modules where high-power leading high-operation-temperature and absolute thermal reliability are required for developing the next-generation solid-state lighting industry