CAJ | 학술논문

以Tb4 O7和Ga2 O3（化学计量比为3∶5）、Ho2 O3、Yb2 O3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1200℃下烧结10 h得到了Ho，Yb∶Tb3 Ga5 O12（ 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1200℃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5 S2，5 F4向基态5 I8跃迁，实现了绿光输出，而Ho3＋由激发态5 F5和5 F3向基态5 I8跃迁，分别实现了红光和蓝光输出。
이Tb4 O7화Ga2 O3（화학계량비위3∶5）、Ho2 O3、Yb2 O3위원료，기중Yb3＋적참잡농도위8at．％，Ho3＋적참잡농도분별위0.5at．％、1at．％、1.5at．％、2.0at．％，이탄산경안위침정제，재1200℃하소결10 h득도료Ho，Yb∶Tb3 Ga5 O12（ Ho， Yb∶TGG）납미분체。대양품진행료XRD물상분석、열중-차열분석、홍외광보분석이급소묘전경분석、상전환발사광보분석。실험결과표명，온도위1200℃하양품평균정립척촌위38.10 nm。재빙포원위980 nm격발하，Ho3＋참잡농도위1.5at．％，Yb3＋참잡농도위8at．％시，재홍、록、람파단범위내출현료명현적상전환발광현상，병대기형성궤리진행료토론。분석인위，Ho3＋유격발태5 S2，5 F4향기태5 I8약천，실현료록광수출，이Ho3＋유격발태5 F5화5 F3향기태5 I8약천，분별실현료홍광화람광수출。
With ammonium bicarbonate as the precipitating agent , using Tb4 O7 , Ga2 O3 , Ho2 O3 , Yb2 O3 as raw materials(the stoichiometry of Tb4O7 and Ga2O3) is 3∶5 and doping Yb3+(8at.%)/Ho3+(0.5at.%、1at.%、1.5at.%、2.0at.%respectively), Ho,Yb∶Tb3 Ga5 O12 ( Ho,Yb∶TGG) nano-powder was sintered at 1 200 ℃ for 10 h to obtain a pure phase .The samples were characterized by XRD , TG-DTA, Infrared Spec-troscopy(IRS), Scanning Electron Microscopy (SEM) and upconversion emission spectroscopy .The experi-mental 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.%)/Ho3+(1.5at.%) concentrations were used , there was a clear upcon-version 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 states 5 S2 and 5 F4 to ground state 5 I8 , achieving the launch of green , and it transits from excited states 5 F5 and 5 F3 to ground state 5 I8 , a-chieving the launch of red and blue respectively .