Efficient visible to near-infrared energy transfer in Ce³⁺-Yb³⁺ co-doped Y₂SiO₅ phosphors

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• 作者：Hao Zhang ; XueYun Liu ; FengYang Zhao ; LiHong Zhang ; YanFan Zhang ; Hai Guo ; ^ghh@zjnu.cn
• 关键词：Y2SiO5 ; Ce3+ ; Yb3+ ; Energy transfer ; Downconversion
• 刊名：Optical Materials
• 出版年：2012
• 期刊代码：81_09253467
• 类别：ch
• 出版时间：May, 2012
• 卷：34
• 期：7
• 页码：1034-1036
• 文件大小：344 K

摘要

Y₂SiO₅:Ce³⁺,Yb³⁺ phosphors were prepared by a conventional solid-state reaction method. Through an efficient energy transfer process, the obtained powders exhibit both a broad ultraviolet-visible emission of Ce³⁺ (375-500 nm) and a near infrared emission of Yb³⁺ (around 980 nm) with considerable intensity under a broad ultraviolet excitation (325-380 nm). Energy transfer phenomenon between the sensitizer and activator were investigated, luminescent spectra, decay times of Ce³⁺ ions and energy transfer efficiency prove that energy transfer process from Ce³⁺ to Yb³⁺ is very efficient. Our results demonstrate that these phosphors may find potential application in improving the efficiency of silicon based solar cells.