摘要
采用传统高温固相方法制备了Gd0.97Nb1-xVxO4∶Eu0.03(x=0.2,0.4,0.6,0.8和1)红色荧光粉。利用X射线粉末衍射对Gd0.97Nb1-xVxO4∶Eu0.03粉末进行了结构分析。研究了室温下该荧光粉的激发光谱和发射光谱特性。实验结果表明,这种荧光粉分别在315nm和395.5nm紫外光的激发下,Gd3+和Eu3+的掺杂浓度一定时,样品的发射光谱随着x值的增加红光发射(λ=619nm)强度逐渐变强,x=0.8时最强。研究了激活剂的浓度不变,而NbO3-4离子和VO3-4离子的浓度变化的条件下粉末的光谱性质。在激发光谱中,在200～320nm范围中出现了非常宽的谱带。这种荧光粉是一种可能应用于白光LED上的红色荧光材料。
Red-emitting phosphors formulated as Gd0. 97 Nbl-xVx04 ： Eu0.03 （x= 0. 2, 0.4, 0.6）. , o. o anai J were synthesized through conventional solid state reaction. The structure, the excitation and emission spectra of the phosphors were tested by using XRD and fluorescence spectrometry. The results suggest that, under 315nm and 395.5nm excitation, the intensity of the red emission around 619nm increases as the x value increases for the samples with constant Eu3＋ ions doping. Studied was also the influence of the concentration ot NbO43- and VO43-on the luminescent properties of the phosphors. With the increase in x value, a rather wide band in the range of 200-320nm appears in all the excitation spectra. This phosphor may be used as the red component in the application of white LED.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2013年第1期137-141,共5页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(11264040)
新疆少数民族科技人才特殊培养计划科研资助项目(200923117)
新疆师范大学研究生创新基金资助项目(20121212)
新疆师范大学物理与电子工程学院研究生创新基金资助项目(LLWLY201110)
关键词
红色荧光粉
激发光谱
发射光谱
发射主峰
钒酸盐
red-emitting phosphors
excitation spectrum
emission spectra
red peaks
vanadium acid
