Optical temperature sensing properties of Er³⁺, Yb³⁺ co-doped NaGd(MoO₄)₂ phosphor

详细信息    查看全文

• 作者：Wenbo Bi ; Qingyu Meng ; ^{qingyumeng163@163.com" class="auth_mail" title="E-mail the corresponding author} ; Wenjun Sun ; Shuchen Lu
• 关键词：Hydrothermal method ; Er3+ ; Up-conversion ; Temperature sensing
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：1460-1465
• 全文大小：1424 K

文摘

Er³⁺, Yb³⁺ co-doped NaGd(MoO₄)₂ phosphors by using sodium citrate as chelating agent were synthesized by hydrothermal method. The structure and morphology were characterized by means of X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The temperature-dependent up-conversion spectra of Er³⁺, Yb³⁺ co-doped NaGd(MoO₄)₂ phosphor under the excitation of 980 nm laser with different ratios of Cit³⁻/Re³⁺ has been measured. It was found that the Cit³⁻/Re³⁺ ratio considerably influenced the sample's morphology. The temperature sensing performance for the samples with various morphologies was studied based on the change of emission intensities from two thermally coupled ²H_11/2 and ⁴S_3/2 levels of Er³⁺. It was found that the temperature sensitivity can up to a relative high value of 0.0161 K⁻¹, which was obtained for the sample with the ratio of Cit³⁻/Re³⁺ was 0.5. Finally, physical mechanism of morphology-dependent temperature sensing sensitivity was explained and predicted.