摘要
采用微乳液-水热法制备了NaY(MoO4)2∶Eu3+和Na(Y,Gd)(MoO4)2∶Eu3+荧光粉.利用X射线衍射(XRD)、扫描电镜(SEM)和荧光光谱手段对样品进行了表征.所制样品的X射线衍射峰与标准卡片PDF#82-2369基本吻合.SEM图谱显示所制备的纳米粒子直径为0.5～0.8μm.激发-发射光谱显示,在Eu掺杂浓度为4%时NaY(MoO4)2∶Eu3+发光强度最高;当物质的量比Y∶Gd=0.5∶0.5时,Na(Y,Gd)(MoO4)2∶4%Eu3+的发光强度达到最大,并且在276,395和465 nm波长光激发下Na(Y0.48,Gd0.48)(MoO4)2∶4%Eu3+分别发出淡粉、黄色和橙红色光,可用于白光LED荧光材料.
Eu3＋-doped NaY（MoO4）2 and Na（Y,Gd）（MoO4）2 phosphors were prepared via microemulsion-hydrothermal method.X-ray diffraction（XRD）,scanning electron microscopy（SEM） and fluorescence spectroscopy were used to characterize the samples.The XRD of as-prepared samples were in agreement with the PDF # 82-2369 of NaY（MoO4）2.SEM images showed that the as-prepared particles had a diameter size ranging from 0.5 to 0.8 μm.The critical activator molar concentration（Eu3＋） in NaY（MoO4）2∶Eu3＋ was 4%,and the luminescent intensity of Na（Y,Gd）（MoO4）2∶4%Eu3＋was maximum when Y∶Gd molar ratio at 0.5∶0.5.Excited by 276,395 and 465 nm,Na（Y0.48,Gd0.48）（MoO4）2∶4%Eu3＋exhibited pale pink,yellow and orange-red respectively.The sample of Na（Y,Gd）（MoO4）2∶Eu3＋could become a valuable lu-minescent material for white LED.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2011年第13期1565-1569,共5页
Acta Chimica Sinica
基金
吉林省教育厅重大科技支撑项目(No.2009JYT19)资助项目
关键词
微乳液-水热法
钼酸盐
白光二极管
荧光光谱
microemulsion-hydrothermal method
molybdates
WLED
fluorescence spectroscopy
