YVO_4:Eu^(3+),Al^(3+)荧光粉的制备及荧光性能研究  

Synthesis and Photoluminescence Properties of YVO_4:Eu^(3+),Al^(3+) Phosphors

作　　者：钟迎娟[1] 刘梅强[1] 李兆梅[1] 胡晓琳[1] 高绍康[1] 

机构地区：[1]福州大学化学化工学院,福建福州350108

出　　处：《中国稀土学报》2011年第4期445-449,共5页Journal of the Chinese Society of Rare Earths

基　　金：福建省科技厅科研项目(JB05017);国家自然科学基金(6108040)资助

摘　　要：用高温固相法制备了Al3+掺杂的YVO4:Eu3+荧光粉。采用X射线粉末衍射(XRD)、环境扫描电镜(SEM)、荧光光谱(FL)等对样品进行了表征。分析了Al3+掺杂对YVO4:Eu样品晶体结构、晶胞参数和荧光性能的影响,并探讨了烧结温度对光谱性能的影响。研究结果表明:当Eu3+的浓度x(摩尔百分比)为4%,Al3+的浓度为1.5%时,在1100℃下烧结的样品其荧光性能最好,5D0→7F2处的发光强度约为未掺Al3+的2.5倍。由于Eu3+的7F2→5L6跃迁吸收,YVO4:Eu3+,Al3+荧光粉可在395 nm被有效激发。因此,YVO4:Eu3+,Al3+可以作为近紫外激发的白光LED红色荧光粉。A series of red phosphors YVO4∶Eu3＋,Al3＋ were synthesized by solid state reaction.The crystal structure and image of samples were characterized by X-ray diffraction（XRD） and scanning electron microscopy（SEM）.The spectra properties of the obtained phosphors were also characterized by fluorescent spectrum（FL）.The effects of Al3＋-doping on crystallization and luminescent properties of YVO4∶Eu3＋ phosphors were investigated.The results showed that the emission intensity of Y0.945VO4∶Eu3＋0.04Al3＋0.015 was 2.5 times higher than those without doping Al3＋,when the concentration of Eu3＋ was 4%,Al3＋ was 1.5% and the sample was annealed at 1100 ℃ for 8 h.The excitation and emission spectra indicated that the phosphors YVO4∶Eu3＋,Al3＋ could be efficiently excited by 395 nm,which were suitable with the emission of near UV LED.

关 键 词：YVO4:Eu^3+ Al^3+ 红色荧光粉 白光LED 高温固相法 稀土 

分 类 号：O614[理学—无机化学] O482.31[理学—化学]