Temporal dynamics of upconversion luminescence in Er<sup>3+sup>, Yb<sup>3+sup> co-doped crystalline KY(WO<sub>4sub>)<sub>2sub> thin films

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• 作者：S. Garc&#xed ; a-Revilla ; R. Valiente ; Y.E. Romanyuk ; M. Pollnau
• 关键词：Upconversion ; KY(WO<sub>4sub>)<sub>2sub> ; Er<sup>3+sup> ; Yb<sup>3+sup> ; Thin films
• 刊名：Journal of Luminescence
• 出版年：2008
• 期刊代码：54_00222313
• 类别：ch
• 出版时间：May-June 2008
• 卷：128
• 期：5-6
• 页码：934-936
• 文件大小：209 K

摘要

Crystalline Er<sup>3+sup> and Yb<sup>3+sup> singly and doubly doped KY(WO<sub>4sub>)<sub>2sub> thin films were grown by low-temperature liquid-phase epitaxy. Absorption, luminescence, excitation and temporal evolution measurements were carried out for both Er<sup>3+sup> and Yb<sup>3+sup> transitions from 10 K to room temperature. Green Er<sup>3+sup> upconversion luminescence was observed after Yb<sup>3+sup> and Er<sup>3+sup> excitation. The mechanisms responsible for the upconversion phenomena detected in each case were identified.