Preparation,optical properties and energy transfer of SrLaAlO_(4):Dy^(3+),Eu^(3+)  

作　　者：Wei Chen Heng Zhang Desheng Zhu 

机构地区：[1]School of Physic and Optoelectronic Engineering,Yangtze University,Jingzhou,434023,China

出　　处：《Journal of Rare Earths》2024年第11期2058-2067,I0003,共11页稀土学报（英文版）

基　　金：Project supported by Outstanding Young and Middle-aged Scientific Innovation Team of Colleges and Universities of Hubei Province(T2020008)。

摘　　要：A series of Dy^(3+)/Eu^(3+) single doped and co-doped SrLaAlO_(4) phosphors was synthesized by the traditional high-temperature solid-state method,and their structure,morphology and optical properties were characterized.The X-ray diffraction(XRD) shows a small amount of doping with Dy^(3+) and Eu^(3+) does not change the crystal structure of the matrix SrLaAlO_(4) and the best synthesis temperature is 1450℃.The scanning electron microscopy(SEM) indicates the particle size directly ranges from 1 to 5μm roughly and the energy dispersive spectroscopy(EDS) patterns show that SrLaAlO_(4):Dy^(3+) phosphor and SrLaAlO_(4):Dy^(3+),Eu^(3+) phosphor were successfully synthesized.SrLaAlO_(4):Dy^(3+) phosphor can be effectively excited by near-ultraviolet light,producing two strong emission lights at 483 nm(blue light) and 579 nm(yellow light),presenting a cold white light;SrLaAlO_(4):Eu^(3+) phosphor can be effectively excited by nearultraviolet light,producing red lights at 622 nm;the characteristic emission peaks of Dy^(3+) and Eu^(3+)can be shown simultaneously under the same excitation wavelength in SrLaAlO_(4):Dy^(3+), Eu^(3+) phosphor.By changing the relative doping concentration ratio of Dy^(3+) and Eu^(3+),the modulation of SrLaAlO_(4):Dy^(3+),Eu3+phosphor from cold white to warm white light can be achieved.In addition,the study of the luminescent mechanism and lifetime shows that there is energy transfer between Dy^(3+) and Eu^(3+) in SrLaAlO_(4):Dy^(3+),Eu^(3+) phosphor.

关 键 词：High-temperature solid-phase method SrLaAlO_(4):Dy^(3+) Eu^(3+) Luminescence properties White phosphor Energy transfer Rare earths 

分 类 号：TQ422[化学工程]