Optimizing Er/Yb ratio and content in Er–Yb co-doped glass-ceramics for enhancement of the up- and down-conversion luminescence
Optimizing Er/Yb ratio and content in Er–Yb co-doped glass-ceramics for enhancement of the up- and down-conversion luminescence
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DOI：
10.1016/j.solmat.2012.01.019
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发表时间：
2012-05
影响因子：
6.9
通讯作者：
V. Tikhomirov;V. D. Rodríguez;J. Méndez-Ramos;J. del-Castillo;D. Kirilenko;G. Tendeloo;V. Moshchalkov-V.-Moshc
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文献类型：
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作者：
V. Tikhomirov;V. D. Rodríguez;J. Méndez-Ramos;J. del-Castillo;D. Kirilenko;G. Tendeloo;V. Moshchalkov-V.-Moshc
制备了不同Er/Yb含量和比例的Er 3 +-Yb 3+共掺透明微晶玻璃。已经检测到分别通过从Yb 3+到Er 3+和从Er 3+到Yb 3+的能量转移的上转换和下转换发光的高量子产率，并且相对于Er/Yb含量和比率进行了优化，并且特别提出了用于太阳能光谱的上转换和下转换以提高太阳能电池的效率。研究了Er ~（3+）和Yb ~（3+）激发能级布居的上升和衰减动力学。在此基础上，提出了Er ~（3+）参与Yb ~（3+）能量转移的机理，并重点讨论了提高Er ~（3+）参与Yb ~（3+）能量转移效率的最佳Er/Yb含量和比例。
Er3+–Yb3+co-doped transparent glass-ceramics with varying Er/Yb content and ratio have been prepared. High quantum yields for up- and down-conversion luminescence by energy transfer from Yb3+to Er3+and from Er3+to Yb3+, respectively, have been detected and optimized with respect to the Er/Yb content and ratio, and proposed in particular for up- and down-conversion of solar spectrum for enhancement of the efficiency of solar cells. The rise and decay kinetics for the population of the excited levels of Er3+and Yb3+have been studied and fit. Based on these experimental data, the mechanisms for the energy transfers have been suggested with emphasis on the optimized Er/Yb content and ratio for enhancement of the efficiency of the Er3+↔Yb3+energy transfers.