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Influence of Yb^(3+) concentration on the upconversion luminescence of oxyfluoride material doped with Er^(3+)

Science China(physics,Mechanics & Astronomy) 2010年第2期53卷 310-314页

作者： ZHAO SuLing1,XU Zheng1,WANG LiHui2 & S. Wageh3 1 Institute of Optoelectronic Technology,Key Laboratory of Luminescence and Optical Information (Beijing Jiaotong university),Ministry of Education,Beijing 100044,China 2 department of physics,Chinese People’s Public Security university,Beijing 100038,China 3.physics & engineering mathematics department faculty of electronic engineering menufiya university,menouf 3.952,egypt 1. Institute of Optoelectronic Technology Key Laboratory of Luminescence and Optical Information (Beijing Jiaotong University) Ministry of Education Beijing 100044 China2. Department of Physics Chinese People’s Public Security University Beijing 100038 China3. Physics & Engineering Mathematics Department Faculty of Electronic Engineering Menufiya University Menouf 32952 Egypt

In this paper,a new upconversion luminescent material co-doped with Erbium and Ytterbium is reported. The upconversion luminescence transition routes and related properties are studied. The results show that the absorption and emission intensities under excitation of 980 nm laser increase with the increase of the Yb3+ concentration. The red emission is stronger than the green emission. The energy transfer process plays an important role in the upconversion mechanism.

关键词： upconversion luminescence Er3+ Yb3+

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Preface

引用

Science China(physics,Mechanics & Astronomy) 2011年第5期54卷 803-803页

作者： Prof. WANG ChongYu Academician in Chinese Academy of Sciences department of physics, Tsinghua university Chinese Academy of Sciences department of physics Tsinghua University Beijing China

Since a broad range of issues in material science involves multiple scales in space and time, multi-scale modeling and simulation of materials is currently one of the major research topics in material science worldwide. The various levels of material modeling can be roughly grouped into microscopic, mesoscopic, and macroscopic regimes. The microscopic scale refers to atomic level and lattice defect ensembles below the grain scale, from electronic first-principles to atomic molecular dynamics and Monte Carlo methods. Mesoscopic scale refers to lattice defect ensembles at the grain scale, and a typical simulation method at this scale is the phase field. Macroscopic scale refers to the sample geometry represented by a finite element method. These computer simulation methods of different scales have proven to be very useful for the study of fundamental physics, structure and properties of materials, which are not easily accessible via experiment. Moreover, with the advance in computing power, these methods have developed in a remarkable way, not only at the respective space and time scales but also at the couplings between the different scales. They are now becoming increasingly applicable for material processing and performance prediction in advanced engineering and technology applications.

关键词：多尺度建模材料科学蒙特卡罗方法晶格缺陷微观尺度模拟方法时间尺度分子动力学

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