摘要
采用高温固相合成法制备了多组Yb^(3+)/Ho^(3+)/Tm^(3+)不同物质的量分数掺杂的LiTaO_(3)多晶材料,测试了双掺Yb^(3+)/Ho^(3+),Yb^(3+)/Tm^(3+)和三掺Yb^(3+)/Ho^(3+)/Tm^(3+)的LiTaO_(3)多晶的X射线衍射图谱、紫外-可见吸收谱和上转换荧光发射谱。X射线衍射(XRD)结果显示,稀土离子掺杂没有改变LiTaO_(3)多晶的物质结构,这表明稀土离子以取代基质离子的方式进入了晶格中。样品的紫外吸收边显示,增加Ho^(3+)或Tm^(3+)物质的量分数会导致吸收边先红移再蓝移。在980 nm泵浦光激发下,可见光区域中出现上转换蓝光(475 nm)、绿光(545 nm)和红光(663 nm和650 nm)发射,通过改变LiTaO_(3)中的激活离子Ho^(3+)-Tm^(3+)物质的量分数,可对上转换荧光色度进行调节,物质的量分数配比为2.0%Yb^(3+)/0.05%Ho^(3+)/0.4%Tm^(3+)的掺杂LiTaO_(3)多晶材料实现了最为接近标准白光的发射。
The Yb^(3+)/Ho^(3+)/Tm^(3+)-doped LiTaO_(3)polycrystalline materials at various doping mole fractions were prepared using a high-temperature solid-state synthesis method.The X-ray diffraction(XRD)patterns,ultraviolet-visible absorption(UV-Vis)spectra,and upconversion fluorescence emission spectra of Yb^(3+)/Ho^(3+)-doped,Yb^(3+)/Tm^(3+)-doped,and Yb^(3+)/Ho^(3+)/Tm^(3+)-doped LiTaO_(3)samples were tested.The XRD results indicate that the doped rare earth ions have not altered the crystal structure of LiTaO_(3),suggesting that the rare earth ions entered the lattice by replacing the host ions.The UV absorption edge of the samples shows a redshift followed by a blueshift with increasing mole fractions of Ho^(3+)or Tm^(3+).Under excitation from a 980 nm pump source,upconversion blue light(475 nm),green light(545 nm),and red light(663 nm and 650 nm)were observed in the visible region.The upconversion fluorescence chromaticity can be tailored by varying the mole fractions of Ho^(3+)/Tm^(3+)in LiTaO_(3).Among the samples,the mole fractions 2.0%Yb^(3+)/0.05%Ho^(3+)/0.4%Tm^(3+)doped LiTaO_(3)polycrystalline specimen exhibits the excellent upconversion output near the standard white light.
作者
张涛
李振辉
崔彩霞
张丹燚
蔡玉东
辛一凡
Zhang Tao;Li Zhenhui;Cui Caixia;Zhang Danyi;Cai Yudong;Xin Yifan(Beihai Campus,Guilin University of Electronic Technology,Beihai 536000,China;School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China;College of Science,Harbin Engineering University,Harbin 150001,China)
出处
《强激光与粒子束》
CAS
CSCD
北大核心
2023年第12期28-34,共7页
High Power Laser and Particle Beams
基金
国家自然科学基金项目(12064005)
广西自然科学基金项目(2021GXNSFDA075006,2021GXNSFAA220086)
桂林电子科技大学研究生教育创新计划项目(2022YCXS057)
桂林电子科技大学研究生课程建设项目(YKC202208)。
