pH值和尿素浓度对Yb^3+/Er^3+共掺杂Y2O3微纳米晶的形成及上转换荧光性质的影响  

Influence of pH and Urea Concentration on Formation and Upconversion Fluorescence Properties of Yb^3+/Er^3+Co-doped Y2O3 Nanocrystals

作　　者：冷静 刘润茹[2] 王德军 杨强[2] LENG Jing;LIU Runru;WANG Dejun;YANG Qiang(School of Materials Science and Engineering,Changchun University of Technology,Changchun 130012,China;College of Science,Changchun University,Changchun 130022,China;Graduate Faculty,Changchun University,Changchun 130022,China)

机构地区：[1]长春工业大学材料科学与工程学院,长春130012 [2]长春大学理学院,长春130022 [3]长春大学研究生院,长春130022

出　　处：《吉林大学学报（理学版）》2020年第3期698-703,共6页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:11504029);吉林省教育厅“十三五”科学技术研究项目(批准号:JJKH20181018KJ);吉林省发改委高技术产业创新项目(批准号:2018C043-1);吉林省科技厅自然科学基金(批准号:20190201105JC).

摘　　要：利用均相共沉淀法,通过调节前驱体溶液的pH值和尿素浓度,经700℃烧结后合成一系列Y2O3∶Er^3+,Yb^3+上转换微纳米晶颗粒.用X射线衍射(XRD)、透射电子显微镜(TEM)、Fourier变换红外光谱(FITR)和荧光光谱对样品的物相结构、微观形貌和发光性能进行表征,并分析上转换机理.实验结果表明:前驱体溶液中的pH值对Y2O3∶Er^3+,Yb^3+粒径影响较大,随着pH值的升高,粒径明显增大,样品在绿色(500~600 nm)和红色(650~700 nm)的上转换荧光强度明显增强,红绿比逐渐减小;尿素浓度对Y2O3∶Er^3+,Yb^3+纳米颗粒的影响较小.Y2O3∶Er^3+,Yb^3+nanocrystals were synthesized at different pH values and various urea concentration by homogeneous coprecipitation method after 700℃sintering.The phase structure,microstructure and luminescent properties of the samples were characterized by X-ray diffraction(XRD),transmission electron microscopy(TEM),Fourier transform infrared spectra(FTIR)and fluorescence spectrometer.The results show that the pH value has great effect on the particle size of Y2O3∶Er^3+,Yb^3+and the particle size increases with the increase of pH value.The upconversion fluorescence intensity of green(500-600 nm)and red(650-700 nm)is obviously enhanced,and red-green ratio is gradually reduced.The effect of urea concentration on Y2O3∶Er^3+,Yb^3+nanoparticles is small.

关 键 词：上转换发光 稀土离子 共沉淀法 

分 类 号：O614.33[理学—无机化学] O482.31[理学—化学]