Optical Temperature Sensing Behavior of High‐Efficiency Upconversion: Er3+–Yb3+ Co‐Doped NaY(MoO4)2 Phosphor |
| |
| Authors: | Xingxing Yang Zuoling Fu Yanmin Yang Chunpeng Zhang Zhijian Wu Tianqi Sheng |
| |
| Affiliation: | 1. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China;2. Luminescence and Display Research Institute, College of Physics Science and Technology, Hebei University, Baoding, China;3. State Key Laboratory of Rare Earth Resources Utilization, Chinese Academy of Sciences, Changchun Institute of Applied Chemistry, Changchun, China |
| |
| Abstract: | A class of Yb3+/Er3+ co‐doped NaY(MoO4)2 upconversion (UC) phosphors have been successfully synthesized by a facile hydrothermal route with further calcination. The structural properties and the phase composition of the samples were characterized by X‐ray diffraction (XRD). The UC luminescence properties of Yb3+/Er3+ co‐doped NaY(MoO4)2 were investigated in detail. Concentration‐dependent studies revealed that the optimal composition was realized for a 2% Er3+ and 10% Yb3+‐doping concentration. Two‐photon excitation UC mechanism further illustrated that the green enhancement arised from a novel energy‐transfer (ET) pathway which entailed a strong ground‐state absorption of Yb3+ ions and the excited state absorption of Yb3+–MoO42? dimers, followed by an effective energy transfer to the high‐energy state of Er3+ ions. We have also studied the thermal properties of UC emissions between 303 and 523 K for the optical thermometry behavior under a 980 nm laser diode excitation for the first time. The higher sensitivity for temperature measurement could be obtained compared to the previous reported rare‐earth ions fluorescence based optical temperature sensors. These results indicated that the present sample was a promising candidate for optical temperature sensors with high sensitivity. |
| |
| Keywords: | |
|
|
