发光学报2025，Vol.46Issue(6)：1057-1066,10.DOI:10.37188/CJL.20250012
紫光激发类太阳光LED用Eu2+激活硅酸盐黄色荧光粉合成及发光性能
Synthesis and Luminescence Properties of Eu2+Activated Silicate Yellow Phosphor for Violet-excited Sunlike LEDs
摘要
Abstract
Sunlike LEDs,with their advantages of excellent spectral continuity,high color rendering index(Ra),high color fidelity(Rf),and high color saturation(Rg),have become an inevitable trend in the future of healthy light-ing development.Efficient and stable multi-color phosphors are the key materials for achieving sunlike/full-spectrum LEDs.In this paper,a novel violet-excited yellow phosphor,[(Ba0.6Ca0.7Sr0.7)O2-SiO2]∶Eu2+was synthesized using a high-temperature solid-state method based on an entropy-increasing strategy.This phosphor,under 371 nm ultravi-olet excitation,emits yellow light with a spectral range of 420-800 nm and a central wavelength of 560 nm,achiev-ing an external quantum efficiency of 75%.Notably,under 400 nm violet excitation,the luminous intensity of the phosphor can reach 88.2%of its maximum emission at the optimal excitation wavelength,achieving an external quantum efficiency of 53.0%,demonstrating good adaptability to violet chips.Finally,a sunlike LED was fabricated by combining the[(Ba0.6Ca0.7Sr0.7)O2-SiO2]∶Eu2+yellow phosphor with commercial red,blue,and cyan phosphors and coupling with a 410 nm violet LED chip.The resulting LED exhibited high color rendering index(Ra=96),high color saturation index(Rg=100),and high color fidelity index(Rf=95.1).The entropy-increasing strategy proposed in this study also provides a new approach for the development of novel high-efficiency and stable phosphor systems.关键词
熵增/高效/黄色荧光粉/类太阳光LED/健康照明Key words
entropy-increasing/high efficiency/yellow phosphor/sunlike LED/healthy lighting分类
数理科学引用本文复制引用
田玉珂,吴江华,覃志宇,蒋广翔,董浪平,侯京山,房永征..紫光激发类太阳光LED用Eu2+激活硅酸盐黄色荧光粉合成及发光性能[J].发光学报,2025,46(6):1057-1066,10.基金项目
国家重点研发计划(2021YFB3500500,2021YFB3500502) （2021YFB3500500,2021YFB3500502）
上海市光探测材料与器件工程中心(20DZ2252600) Supported by National Key Research and Development Program of China(2021YFB3500500,2021YFB3500502) （20DZ2252600）
Shanghai Light Detection Materials and Devices(20DZ2252600) （20DZ2252600）
