发光学报2024，Vol.45Issue(3)：415-423,9.DOI:10.37188/CJL.20240002
多格位阳离子共掺提升LiScSi2O6∶Cr3+近红外荧光粉的光吸收
Enhancing Light Absorption of LiScSi2O6:Cr3+ NIR-emitting Phosphors via Multisite Cation Substitution
摘要
Abstract
Na+/In3+/Ge4+ singly-doped or co-doped LiScSi2O6∶Cr3+ phosphors were prepared by high-temperature sol-id-state reaction.Light absorption and photoluminescence(PL)properties were studied by diffuse reflection spec-trum,PL excitation/emission spectrum and quantum efficiency measurements.The results show that the absorption to the blue light at 460 nm can be enhanced for the LiScSi2O6∶Cr3+ phosphor by single ion substitution,such as Na+ for Li+,In3+ for Sc3+,and Ge4+ for Si4+.The absorption efficiency(AE)can be further increased by multisite cation substitution with Na+,In3+ and Ge4+,from an AE value of 50.5%for the LiScSi2O6∶Cr3+ phosphor to 60.9%for the Li0.8Na0.2Sc0.4In0.6Si1.6Ge0.4O6∶Cr3+ phosphor.The light absorption enhancement can be attributed to the increased distortion degree of Cr3+ coordination octahedron caused by single ion substitution or multisite cation substitution.The optimized LiSc0.4In0.6Si1.6Ge0.4O6∶Cr3+ phosphor exhibits a broadband near-infrared(NIR)emission peaking at～860 nm,with a full width at half maximum(FWHM)of～160 nm and an internal(external)quantum efficiency of 72.5%(41.8%).The fabricated phosphor-converted LED(pc-LED)device shows a NIR output power of 63.1 mW and an energy conversion efficiency of 22.3%at 100 mA drive current.The study provides an effective approach to enhance the light absorption capacity of Cr3+-activated NIR phosphors.关键词
近红外荧光粉/Cr3+激活/多格位掺杂/光吸收调控Key words
NIR phosphor/Cr3+ activated/multisite cation substitution/light absorption regulation分类
数理科学引用本文复制引用
于世杰,伍宇博,段道川,邵起越,蒋建清..多格位阳离子共掺提升LiScSi2O6∶Cr3+近红外荧光粉的光吸收[J].发光学报,2024,45(3):415-423,9.基金项目
江苏省科技成果转化专项资金项目(BA2020007)Supported by the Transformation Program of Scientific and Technological Achievements of Jiangsu Province(BA2020007) （BA2020007）
