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, radiative lifetime, radiative quantum efficiency and the effective emission bandwidth were investigated. The upconversion luminescence intensity of Er3+ ions in the glass ceramics increased significantly with the increasing crystallization temperature. The transition mechanisms of the green and red upconversion luminescence were ascribed to a two-photon process, and the blue upconversion......
Tm3+/Yb3+共掺氧氯碲酸盐玻璃上转换发光研究 赵士龙1,徐时清1,张丽艳1,王宝玲1,陈亮1 (1.中国计量学院信息工程学院光电材料与器件研究所,浙江,杭州,310018) 摘要:制备了Tm3+/Yb3+共掺氧氯碲酸盐玻璃, 研究了玻璃的热稳定性能, Raman光谱和上转换发光光谱, 分析了上转换发光机制. 结果表明: 通过980 nm的激光二极管激发, 在室温下同时观察到强烈的蓝光(476 nm)和微弱的红光(649 nm), 分别是Tm3+离子的1G4→3H6和1G4→3H4跃迁. 随氯化铅含量增加, 基质玻璃的热稳定性能增强, 基质玻璃的声子能量降低, 上转换蓝光和红光的强度......
Yb3+/Er3+/Tm3+共掺氧氟碲酸盐玻璃三基色上转换发光研究 赵士龙1,章珏1,徐时清1,王玮1,鲍仁强1 (1.中国计量学院材料科学与工程学院,浙江,杭州,310018) 摘要:制备了一种新的Yb3+/Er3+/Tm3+共掺氧氟碲酸盐玻璃.研究了ZnF2调整Yb3+/Er3+/Tm3+共掺氧氟碲酸盐玻璃的Raman光谱,吸收光谱和上转换荧光光谱.结果发现,该体系玻璃具有较低的声子能量,在980 nm LD激发下,可以同时观察到明显的蓝色(476nm),绿色(530和545 nm)和红色(656nm)上转换发光.上转换蓝光(476 nm)是由于Tm3+离子1G4→3H6跃迁,上转换......
共沉淀法制备Er3+:Y2O3上转换发光纳米粉 罗军明1,李永绣1,袁永瑞2,邓莉萍2 (1.南昌大学,江西,南昌,330031;2.南昌航空大学,江西,南昌,330063) 摘要:以Y2O3为基质材料,掺杂不同含量的Er3+,采用共沉淀法制备出性能良好的Er3+:Y2O3上转换发光纳米粉.对不同温度下煅烧后的粉体进行了X射线衍射,能谱测试,透射电镜和比表面积分析.结果表明:Er3+完全固溶于Y2O3的立方晶格中,Er3+:Y2O3粉体粒度均匀,近似球形,且随着煅烧温度的升高,其颗粒逐渐变大;1000℃煅烧2 h的粉末尺寸为40~60 nm. 关键词:共沉淀法; Er3+:Y2O3; ......
of Research on the Structure of Matter, Chinese Academy of Sciences摘 要:Optical characteristics and upconversion dynamics of Er3+ in Er3+/Yb3+:LiLa(MoO4)2 crystals... temperature. The maximal emission cross-section near 1530 nm for π-polarization was 0.63×10–20 cm2 and the measured lifetime of 4I13/2 was 4.88 ms. The upconversion process was involved in sequential two-phonon......
,University of Science and Technology of China摘 要:Tm3+/Yb3+ codoped NaYF4 microcrystals were synthesized using a hydrothermal method.The bright upconversion light was observed under 980 nm excitation.The upconversion luminescence was systematically investigated at different Yb3+ concentrations and different reaction temperatures and time.The sample with 60% Yb3......
of Research on the Structure of Matter, Chinese Academy of Sciences摘 要:Optical characteristics and upconversion dynamics of Er3+ in Er3+/Yb3+:LiLa(MoO4)2 crystals... temperature. The maximal emission cross-section near 1530 nm for π-polarization was 0.63×10–20 cm2 and the measured lifetime of 4I13/2 was 4.88 ms. The upconversion process was involved in sequential two-phonon......
,University of Science and Technology of China摘 要:Tm3+/Yb3+ codoped NaYF4 microcrystals were synthesized using a hydrothermal method.The bright upconversion light was observed under 980 nm excitation.The upconversion luminescence was systematically investigated at different Yb3+ concentrations and different reaction temperatures and time.The sample with 60% Yb3......
October 2013 Abstract: The nanocrystalline Ho3+/Tm3+/Yb3+ co-doped CaWO4 upconversion (UC) phosphors were successfully synthesized by a modified citrate complex method using microwave irradiation... white upconversion (UC) emission visible to the naked eye, which is composed of a blue emission at 475 nm from Tm3+, and green and red emissions at 543 and 651 nm respectively from Ho3......
, lifetime of the 4I13/2 level and upconversion fluorescence all decrease with the increase of B2O3 content. The product of full width at half maximum (FWHM) and sti-mulated emission cross-section (σepeak......