Ho,Yb:Tb_3Ga_5O_(12)纳米粉体制备及发光性能研究  

Preparation and luminescent properties of Ho,Yb:Tb_3Ga_5O_(12) nano-powder

作　　者：徐嘉林 金维召 刘旺[1] 彭海益 刘贺[1] 李春[1] 林海[1] 刘景和[1] 曾繁明[1] 

机构地区：[1]长春理工大学光电功能材料教育部工程研究中心,吉林长春130022

出　　处：《中国光学》2015年第4期608-614,共7页Chinese Optics

基　　金：吉林省创新创业训练计划资助项目(No.2014S017)

摘　　要：以Tb4O7和Ga2O3(化学计量比为3∶5)、Ho2O3、Yb2O3为原料,其中Yb3+的掺杂浓度为8at.%,Ho3+的掺杂浓度分别为0.5at.%、1at.%、1.5at.%、2.0at.%,以碳酸氢铵为沉淀剂,在1 200℃下烧结10 h得到了Ho,Yb∶Tb3Ga5O12(Ho,Yb∶TGG)纳米粉体。对样品进行了XRD物相分析、热重-差热分析、红外光谱分析以及扫描电镜分析、上转换发射光谱分析。实验结果表明,温度为1 200℃下样品平均晶粒尺寸为38.10 nm。在泵浦源为980 nm激发下,Ho3+掺杂浓度为1.5at.%,Yb3+掺杂浓度为8at.%时,在红、绿、蓝波段范围内出现了明显的上转换发光现象,并对其形成机理进行了讨论。分析认为,Ho3+由激发态5S2,5F4向基态5I8跃迁,实现了绿光输出,而Ho3+由激发态5F5和5F3向基态5I8跃迁,分别实现了红光和蓝光输出。With ammonium bicarbonate as the precipitating agent,using Tb4O7,Ga2O3,Ho2O3,Yb2O3 as raw materials（ the stoichiometry of Tb4O7 and Ga2O3） is 3∶ 5 and doping Yb^3＋（ 8at. %） /Ho^3＋（ 0. 5at. % 、1at. % 、1. 5at. % 、2. 0at. % respectively）,Ho,Yb ∶ Tb3Ga5O12（ Ho,Yb∶ TGG） nano-powder was sintered at1 200 ℃ for 10 h to obtain a pure phase. The samples were characterized by XRD,TG-DTA,Infrared Spectroscopy（ IRS）,Scanning Electron Microscopy（ SEM） and upconversion emission spectroscopy. The experimental results show that the average grain size of the samples is 38. 10 nm under the temperature of 1 200 ℃.When the samples with Yb^3＋（ 8at. %） /Ho^3＋（ 1. 5at. %） concentrations were used,there was a clear upconversion luminescence in the wavelength rage of blue,green and red by 980 nm LD. The formation mechanism was discussed at the same time. Analyse indicates that Ho^3＋transits from excited states5S2and5F4 to groundstate5I8,achieving the launch of green,and it transits from excited states5F5and5F3 to ground state5I8,achieving the launch of red and blue respectively.

关 键 词：Ho Yb∶TGG 纳米粉体 制备 发光性能 

分 类 号：TN104.3[电子电信—物理电子学]