摘要
为提高蓝绿色荧光粉的发光性能,本文采用传统的高温固相法合成LaNbO_(4)∶Dy^(3+)及LaNbO_(4)∶Dy^(3+),Ca^(2+)荧光粉样品。通过测试样品的XRD、荧光光谱和CIE色度坐标,研究Dy^(3+)单掺,Dy^(3+)、Ca^(2+)共掺对LaNbO_(4)荧光粉性能的影响。结果表明:LaNbO_(4)∶Dy^(3+)及LaNbO_(4)∶Dy^(3+),Ca^(2+)荧光粉的衍射峰都与标准卡衍射峰的位置相匹配。样品的激发光谱均由两个宽带激发峰和一系列尖锐激发峰组成,LaNbO_(4)∶Dy^(3+)和LaNbO_(4)∶Dy^(3+),Ca^(2+)样品的最强激发峰位分别是387和472 nm。在波长为387 nm激发下,样品的最强发射峰值分别是575和477 nm。且当Dy^(3+)掺杂浓度为0.05时,样品发光强度最佳。当Dy^(3+)和Ca^(2+)共掺,且Ca^(2+)浓度为0.05时,样品的发光性能最好。通过色卡坐标可以观察到在蓝绿色区域LaNbO_(4)∶Dy^(3+),Ca^(2+)比LaNbO_(4)∶Dy^(3+)的坐标更加集中,由此可知Dy^(3+)和Ca^(2+)共掺LaNbO_(4)发光效果更好,发光性能更加稳定,表明该荧光粉是一种可被紫外光激发并且光致发光性能稳定的蓝绿色荧光粉。
To improve the luminescence property of blue-green phosphors,the conventional high-temperature solid-phase method was used to synthesize LaNbO_(4)∶Dy^(3+)and LaNbO_(4)∶Dy^(3+),Ca^(2+)phosphors in this paper.The XRD,fluorescence spectra and CIE chromaticity coordinates of the samples were tested to investigate the effects of Dy^(3+)doping and Dy^(3+),Ca^(2+)co-doping on the performance of niobate phosphors.The results show that the diffraction peaks of LaNbO_(4)∶Dy^(3+)as well as LaNbO_(4)∶Dy^(3+),Ca^(2+)phosphors all match the diffraction peaks of standard card.The excitation spectra of the samples are composed of two broadband excitation peaks and a series of sharp excitation peaks,the strongest excitation peaks of LaNbO_(4)∶Dy^(3+)and LaNbO_(4)∶Dy^(3+),Ca^(2+)are 387 and 472 nm,respectively.Under excitation at a wavelength of 387 nm,the strongest emission peaks of the sample are 575 and 477 nm,respectively.The best luminescence intensity is obtained when the concentration of Dy^(3+)doping is 0.05.When Dy^(3+)and Ca^(2+)are co-doped,the sample has the best luminescence property when the concentration of Ca^(2+)is 0.05.Through the color card coordinates,it can be observed that LaNbO_(4)∶Dy^(3+),Ca^(2+)is more concentrated in the blue-green region than LaNbO_(4)∶Dy^(3+),which shows that Dy^(3+)and Ca^(2+)co-doped LaNbO_(4)have better luminescence effect,and the co-doped samples show more stable luminescence property,indicating that the phosphor is a more stable blue-green phosphor that can be excited by UV light.
作者
陆琴
方传利
王游
吴冬妮
王誉洁
娄成龙
LU Qin;FANG Chuanli;WANG You;WU Dongni;WANG Yujie;LOU Chenglong(School of Physics and Electronic Science,Guizhou Normal University,Guiyang 550025,China)
出处
《人工晶体学报》
CAS
北大核心
2023年第10期1816-1821,共6页
Journal of Synthetic Crystals
关键词
荧光粉
稀土铌酸盐
高温固相法
发光性能
共掺
蓝绿光
phosphor
rare earth niobate
high temperature solid state method
luminescence property
co-doping
blue-green light
