Effect of SiO_(2)introduction on luminescence properties of LuAG:Mn^(2+) phosphors  

作　　者：Chenyao Zhao Hui Lin Dawei Zhang Ruijin Hong Shengming Zhou 

机构地区：[1]Engineering Research Center of Optical Instrument and System,Ministry of Education and Shanghai Key Lab of Modem Optical System,University of Shanghai for Science and Technology,Shanghai 200093,China [2]Laboratory of Micro-Nano Optoelectronic Materials and Devices,Key Laboratory of Materials for High-Power Laser,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China

出　　处：《Journal of Rare Earths》2022年第2期253-259,I0003,共8页稀土学报（英文版）

基　　金：Project supported by the Shanghai Science and Technology Innovation Program(19511104600)and the International Partnership Program of Chinese Academy of Sciences(181231KYSB20160005).

摘　　要：Mn^(2+)doped LuAG phosphors with different contents of Si^(4+)ions were synthesized via the solid-state reaction method and the effects of Si^(4+)doping on the crystal structure and luminescence properties of phosphors were studied.XRD patterns of all phosphors exhibit a pure phase but with different extents of deviations.Owing to the 4 T1→6 A1 transition of Mn^(2+),the LuAG:Mn^(2+),Si^(4+)phosphors exhibit a broad emission band with an emission peak at 582 nm.Moreover,the introduction of Si^(4+)not only improves the emission intensity but also induces a red-shift with the emission peak from 582 to 612 nm and the spectra broadening with the full width at half maximum value from 64 to 74 nm,which results from the decrease of bond length between O2-anions and Mn^(2+)cations and the re-absorption of Mn^(2+)-Mn^(2+)pairs.Suitable content of Si^(4+)replacement can weaken thermal quenching of Mn^(2+).Thus,via regulating the content of Si,the Mn^(2+),Si^(4+)co-doped LuAG phosphor with low correlated color temperature is a candidate for warm wLEDs.

关 键 词：Lu_(3)Al_(5)O_(12) Mn^(2+)luminescence Warm white LEDs Transition metal luminescence Rare earths 

分 类 号：TN312.8[电子电信—物理电子学] TQ422[化学工程]