伪-NaYb(Mn)F4:Er3+/Tm3+@NaYF4 UCNPs as 鈥淏and-Shape鈥?Luminescent Nanothermometers over a Wide Temperature Range

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• 作者：Xia Xu ; Zhuo Wang ; Pengpeng Lei ; Yingning Yu ; Shuang Yao ; Shuyan Song ; Xiuling Liu ; Yue Su ; Lile Dong ; Jing Feng ; Hongjie Zhang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：September 23, 2015
• 年：2015
• 卷：7
• 期：37
• 页码：20813-20819
• 全文大小：480K
• ISSN：1944-8252

文摘

Novel flower-like 伪-NaYb(Mn)F₄:Er³⁺/Tm³⁺@NaYF₄ upconversion nanoparticles (UCNPs) as luminescent nanothermometers have been developed by combining liquid鈥搒olid solution hydrothermal strategy with thermal decomposition strategy. Under 980 nm excitation, they exhibit intense upconversion luminescence and temperature-dependent upconversion luminescence over a wide temperature range. The influence of temperature on 鈥渂and-shape鈥?upconversion luminescence (UCL) spectra and the intensity of emission bands are analyzed and discussed in detail. We further successfully test and verify that intensity ratios R_Er of ²H_11/2 鈫?⁴I_15/2 and ⁴S_3/2 鈫?⁴I_15/2 and R_Tm of ¹G₄ 鈫?³H₅ and ³H₄ 鈫?³H₆ are sensitive to temperature, and the population of active ions follows Boltzmann-type population distribution very well. These luminescent nanothermometers could be applied over a wide temperature range from 123 to 423 K with high sensitivity, which enable them to be excellent candidates for temperature sensors.