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<p>The development of multifunctional sensors with high spatial resolution, excellent accuracy, and fast response based on the fluorescence intensity ratio (FIR) technique remains a critical challenge for sensing applications. Here, we report a series of highly sensitive green-emitting LiGa<sub>0.9-<i>x</i></sub>W<sub>2</sub>O<sub>8</sub>:0.1Yb<sup>3+</sup>, <i>x</i>Er<sup>3+</sup> up-conversion (UC) phosphors, whose emission spectra consist of green bands from the <sup>2</sup>H<sub>11/2</sub>/<sup>4</sup>S<sub>3/2</sub> → <sup>4</sup>I<sub>15/2</sub>&#xa0;transitions and a negligible red band from the <sup>4</sup>F<sub>9/2</sub> → <sup>4</sup>I<sub>15/2</sub>&#xa0;transition of Er<sup>3+</sup> ions. Moreover, the maximum absolute sensitivity reaches 0.0118&#xa0;K<sup>−1</sup> at 500&#xa0;K. These results indicate that the present green-emitting phosphors possess excellent potential for use as UC sensors with high and stable sensitivity, making them outstanding candidates for sensing applications.</p>

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Optical temperature sensing properties of Yb3+–Er3+ co-doped LiGaW2O8 up-conversion phosphors

  • 期刊论文

  • 发表日期：

    2026年8月1日

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  • Kai Liu,
  • Jun Zhou,
  • Zhichao Zhang,
  • Jianfeng Xi

摘要

The development of multifunctional sensors with high spatial resolution, excellent accuracy, and fast response based on the fluorescence intensity ratio (FIR) technique remains a critical challenge for sensing applications. Here, we report a series of highly sensitive green-emitting LiGa0.9-xW2O8:0.1Yb3+, xEr3+ up-conversion (UC) phosphors, whose emission spectra consist of green bands from the 2H11/2/4S3/2 → 4I15/2 transitions and a negligible red band from the 4F9/2 → 4I15/2 transition of Er3+ ions. Moreover, the maximum absolute sensitivity reaches 0.0118 K−1 at 500 K. These results indicate that the present green-emitting phosphors possess excellent potential for use as UC sensors with high and stable sensitivity, making them outstanding candidates for sensing applications.