The kinetic limitation of anti-stokes luminescence of Er3+ and Yb3+ doped infrared upconversion materials

被引：0
作者：
Sachin K Mahajan
PK Khare
BP Chandra
机构：
[1] Rani Durgavati University,Department of Post
[2] Samrat Ashok Technological Institute,Graduate Studies and Research in Physics and Electronics
来源：
Pramana | 1999年 / 53卷
关键词：
Anti-Stokes luminescence; upconversion; cross-relaxation; sequential excitation; 78.60; 78.55Hx;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Infrared-to-visible wave-length conversion in the Yb3+−Er3+ doped phosphors system has been described by a simple three level model based on two ions mechanism. The excitation in the range of 900–1000 nm of an IR-photon is first absorbed by Yb3+ ion as a sensitizer attributed to the resonant energy transition in Er3+ ion from 4I3/2 → 4S15/2 and 1F9/2 → 4I15/2, respectively for green and red emission. The essential energy transfer processes in this system i.e. upconversion from 4I11/2 and 1I13/2, cross-relaxation from 4S3/2 and 1F9/2 are taken into account. The limitations of the rate-equation approach are examined with a focus on the underlying dynamics of this rare-earth system.
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页码：903 / 910
页数：7
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