Synthesis of monoclinic Na₃ScF₆:1 mol % Er³⁺/2 mol % Yb³⁺ microcrystals by a facile hydrothermal approach

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• 作者：Shuwei Hao ; Liang Sun ; Guanying Chen ; ^{chenguanying@hit.edu.cn} ; Hailong Qiu ; Chao Xu ; Timonah N. Soitah ; Yu Sun ; Chunhui Yang ; ^{yangchh@hit.edu.cn}
• 关键词：Na3ScF6 microcrystal ; Luminescence ; Upconversion properties
• 刊名：Journal of Alloys and Compounds
• 出版年：2012
• 出版时间：5 May, 2012
• 年：2012
• 卷：522
• 期：Complete
• 页码：74-77
• 全文大小：891 K

文摘

For the first time, a facile hydrothermal approach to synthesize the highly efficient 1 mol % Er³⁺/2 mol % Yb³⁺ codoped Na₃ScF₆ upconversion (UC) microcrystals is reported. The X-ray diffraction (XRD) patterns indicate that the prepared powders possess monoclinic structure. Field emission scanning electron microscopy (FESEM) shows that these samples have monocline morphology with high crystallinity. Under 980 nm diode laser excitation, Na₃ScF₆:1 mol % Er³⁺, 2 mol % Yb³⁺ microcrystals emit strong green and red upconversion emissions. UC mechanisms for these emissions are proposed based on their pump power dependences.