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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• 作者：V.K. Tikhomirov^a ; ^{Victor.Tikhomirov@fys.kuleuven.be} ; V.D. Rodrí ; guez^b ; J. Mé ; ndez-Ramos^b ; J. del-Castillo^b ; D. Kirilenko^c ; G. Van Tendeloo^c ; V.V. Moshchalkov^a
• 关键词：Down-conversion of solar spectrum ; Quantum cutting ; Transparent glass-ceramics ; Enhanced solar cells ; Photoluminescence of rare-earths
• 刊名：Solar Energy Materials and Solar Cells
• 出版年：2012
• 期刊代码：81_09270248
• 类别：ce
• 出版时间：May, 2012
• 卷：100
• 期：Complete
• 页码：209-215
• 文件大小：589 K

摘要

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⁺鈫擸b³⁺ energy transfers.