A new non-contact self-calibrated optical thermometer based on Ce3+ -> Tb3+ -> Eu3+ energy transfer process

作者：Ding, Mingye; Xu, Min; Chen, Daqin^*

来源：Journal of Alloys and Compounds, 2017, 713: 236-247.

DOI：10.1016/j.jallcom.2017.04.202

• beta-NaYF4
• Energy transfer
• FIR
• Optical thermometry
• Sensor

A new optical thermometry strategy based on the Ce3+ -> Tb3+ -> Eu3+ energy migration process has been proposed, which provides a promising approach to design non-contact self-calibrated optical thermometer with high temperature sensitivity and good signal discriminability. Specifically, uniform beta-NaYF4: Ce3+-> Tb3+-> Eu3+ microcrystals have been successfully synthesized to explore its possible application in optical thermometry. Relying on different thermal responses between Ce3+ -> Eu3+ metalmetal charge transfer (MMCT) and Ce3+ -> Tb3+ -> E-u3+ energy transfer process, the fluorescence intensity ratio (FIR) of Eu3+ to Tb3+ in the as-designed material presents excellent temperature sensing performance in the temperature range of 303-563 K. Using the as-synthesized beta-NaYF4: Ce3+ -> Tb3+ -> Eu3+ phosphor as optical thermometric medium, the absolute and relative sensitivities can reach as high as 1.20% K-1 and 1.17% K-1, respectively. This study not only provides an effective approach for developing new optical temperature sensing materials, but also gives a reference for exploring other innovative optical thermometry.

• 出版日期2017-8-5
• 单位杭州电子科技大学