Cui Hongqiang, Cao Yongze, Zhang Yuhang, Li Lei, Li Guojian, Xu Sai, Wang Yichao, Zhang Jinsu, Chen Baojiu
Department of Physics, Dalian Maritime University, Dalian, 116026, China.
Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang 110819, China.
Dalton Trans. 2022 Aug 16;51(32):12352-12361. doi: 10.1039/d2dt01330d.
A series of Er/Yb co-doped CsBiSr(PO) (CBSPO) phosphors with significant thermal enhancement were successfully prepared using the solid-state method and the thermal-enhancing effect was studied in detail. When the temperature increased from 303 to 723 K, the upconversion luminescence (UCL) emission intensities of H → I and H + S → I of Er in CBSPO:0.1Er/0.2Yb were enhanced 22.81 and 10.06 times under 980 nm laser excitation, respectively. Meanwhile, the UCL color of the sample obviously changed from orange to green with the increase in temperature. Furthermore, the UCL thermal enhancement mechanism was demonstrated, which originates from phonon-assisted transitions. In addition, the maximum absolute temperature sensitivity for CBSPO:0.1Er/0.2Yb was calculated to be 0.01026 K at 563 K luminescence intensity ratio (LIR) technology. All the results show that the CBSPO:Er/Yb phosphors can be used for safety warning and temperature measurement at high temperatures.
采用固相法成功制备了一系列具有显著热增强效应的铒/镱共掺杂CsBiSr(PO)（CBSPO）荧光粉，并对其热增强效应进行了详细研究。当温度从303 K升高到723 K时，在980 nm激光激发下，CBSPO:0.1Er/0.2Yb中铒的H→I和H + S→I的上转换发光（UCL）发射强度分别增强了22.81倍和10.06倍。同时，随着温度升高，样品的UCL颜色明显从橙色变为绿色。此外，还证明了UCL热增强机制源于声子辅助跃迁。另外，采用发光强度比（LIR）技术计算得出CBSPO:0.1Er/0.2Yb在563 K时的最大绝对温度灵敏度为0.01026 K。所有结果表明，CBSPO:Er/Yb荧光粉可用于高温安全警示和温度测量。
