Morphologies and up-conversion luminescence of Gd₄O₃F₆:RE³⁺ (RE=Yb, Er, Ho and Tm) phosphors by Hydrothermal Synthesis

详细信息    查看全文

• 作者：Jia Zhang ; ^{zhangjianew@126.com" class="auth_mail" title="E-mail the corresponding author} ; Jianming Jia
• 关键词：Phosphors ; Luminescence ; Upconversion
• 刊名：Journal of Luminescence
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：174
• 期：Complete
• 页码：1-5
• 全文大小：2130 K

文摘

To develop novel upconversion (UC) phosphors in this paper, the Gd₄O₃F₆:Yb³⁺, Er³⁺, Ho³⁺, Tm³⁺ samples were prepared by a facile hydrothermal route, and their morphologies and luminescence properties were investigated. When the hydrothermal reaction conditions change, the final morphologies of the phosphors show some difference, but the relatively dispersed particles could be all obtained. Upon 980 nm excitation, the 10%Yb³⁺-1%Er³⁺ and 10%Yb³⁺-1%Ho³⁺ doped Gd₄O₃F₆ samples exhibit red and green emissions with the chromaticity coordinates of (0.639, 0.358) and (0.308, 0.682), respectively; the 10%Yb³⁺-1%Tm³⁺ doped Gd₄O₃F₆ sample mainly shows a very strong emission peak around 800 nm, which is beneficial to deeper tissue penetration and reduced autofluorescence in bio-imaging. The corresponding UC mechanisms were elucidated through the laser power dependence of the UC emissions. The above results reveal that multicolor lights as well as the NIR emission can be obtained by adjusting the rare earth dopants in the Gd₄O₃F₆ host.