Synthesis,upconversion luminescence and optical heating of hexagonal NaGdF4:Yb3+,Er3+
来源期刊：Journal of Rare Earths2018年第11期
论文作者：Tao Pang Wenbo Peng Ming Yang Jianping Xie Wenhui Lu
文章页码：1136 - 1140
摘 要：An optical heater based on hexagonal NaGdF4:Yb3+/Er3+ is reported. XRD, SEM and EDS characterization results show that F-/Ln3+ can not only control the phase composition, particle size and morphology, but also affect the effective doping concentration of Yb3+ and Er3+.When F-/Ln3+ is 12/1, the strongest upconversion luminescence is obtained. Based on the luminescent temperature sensing behavior of Er3+,the photo-thermal conversion performance was investigated. The results indicate that the temperature of irradiation spot is linearly dependent on the power density, and the photo-thermal responsivity is determined to be 3.3K·cm2/W. Also, it is found that the photo-thermal conversion efficiency can be regulated by changing the Yb3+ doping concentration. Compared with the nano-gold, copper sulfide and carbon nanotubes, the NaGdF4:Yb3+/Er3+ has the triple functions of upconversion luminescence, temperature sensing, and photo-thermal conversion, and may therefore be a promising optical heater for photo-thermal therapy of tumors.
Tao Pang，Wenbo Peng，Ming Yang，Jianping Xie，Wenhui Lu
College of Science, Huzhou University
摘 要：An optical heater based on hexagonal NaGdF4:Yb3+/Er3+ is reported. XRD, SEM and EDS characterization results show that F-/Ln3+ can not only control the phase composition, particle size and morphology, but also affect the effective doping concentration of Yb3+ and Er3+.When F-/Ln3+ is 12/1, the strongest upconversion luminescence is obtained. Based on the luminescent temperature sensing behavior of Er3+,the photo-thermal conversion performance was investigated. The results indicate that the temperature of irradiation spot is linearly dependent on the power density, and the photo-thermal responsivity is determined to be 3.3K·cm2/W. Also, it is found that the photo-thermal conversion efficiency can be regulated by changing the Yb3+ doping concentration. Compared with the nano-gold, copper sulfide and carbon nanotubes, the NaGdF4:Yb3+/Er3+ has the triple functions of upconversion luminescence, temperature sensing, and photo-thermal conversion, and may therefore be a promising optical heater for photo-thermal therapy of tumors.
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