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Blue emissions in Dy~(3+) doped Y_4Al_2O_9 crystals for temperature sensing

机译:Dy〜(3+)掺杂Y_4Al_2O_9晶体中的蓝色发射,用于温度感测

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摘要

Temperature dependent emission spectra and decay times of trivalent dysprosium (Dy~(3+)) activated Y_4Al_2O_9 (YAM) crystals have been studied for the first time (to our knowledge). The ratio of emission lines intensity can be used in temperature measurements, as it is not dependent on the variability of absolute intensity. The Boltzmann model was applied for modeling the temperature variation of the ~4I_(15/2) and ~4F_(9/2) states emissions relative intensities 455 and 481 nm, respectively. The calculated approximation gives highest sensor sensitivity of about 3 × 10~(-3)℃~(-1) for the 600℃-800℃ range, which allows for an expectation of usefulness of Dy~(3+):YAM in high-temperature luminescence thermometry. Also, the measured decay times are suitable for temperature sensing.
机译:首次研究了三价(Dy〜(3+))活化的Y_4Al_2O_9(YAM)晶体的温度依赖性发射光谱和衰变时间。发射线强度之比可用于温度测量,因为它不依赖于绝对强度的可变性。玻尔兹曼模型用于分别模拟〜4I_(15/2)和〜4F_(9/2)状态发射相对强度455和481 nm的温度变化。计算得出的近似值给出了600℃-800℃范围内的最高传感器灵敏度,约为3×10〜(-3)℃〜(-1),这可以预期Dy〜(3 +):YAM在高温下的有用性温度发光测温法。同样,测得的衰减时间也适用于温度检测。

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