Upconversion and luminescence temperature sensitivity of Er3+ ions in yttrium oxysulfate nanophosphor
Upconversion and luminescence temperature sensitivity of Er3+ ions in yttrium oxysulfate nanophosphor
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DOI：
10.1016/j.optmat.2019.109197
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发表时间：
2019-09
影响因子：
3.9
通讯作者：
M. Hernández‐Rodríguez;P. Tadge;A. D. Lozano-Gorrín;U. Rodríguez-Mendoza;S. Ray;V. Lavín
中科院分区：
文献类型：
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作者：
M. Hernández‐Rodríguez;P. Tadge;A. D. Lozano-Gorrín;U. Rodríguez-Mendoza;S. Ray;V. Lavín
用975 nm激光激发掺Er的Y2 O2 SO 4纳米荧光粉，研究了其近红外到绿色的上转换发光。绿色发射的时间动力学表明，负责的上转换过程的主要机制是Er 3+离子之间的能量转移。为了研制生物温度范围（295 ~ 330 K）和工业应用温度范围（475 K）的光学温度传感器，对从2 H（11/2）和4S（3/2）热化能级到4 I（15/2）基态的近红外到绿色上转换辐射的相对强度进行了标定。所得到的温标在300 K时的相对温度灵敏度为1.1%K − 1，在467 K时的绝对温度灵敏度为73 × 10−4K− 1。这些结果表明，Er 3+掺杂的氧硫酸钇可以用作光学温度传感器，在生物医学和工业应用的红外范围内激发。
Near infrared-to-green upconverted emissions of Er3+-doped Y2O2SO4yttrium oxysulfate nanophosphor have been studied exciting the sample with a 975 nm laser radiation. Temporal dynamics of the green emission indicates that the main mechanism responsible for the upconversion processes is energy transfer between Er3+ions. The relative intensities of the near infrared-to-green upconverted emissions from the2H11/2and4S3/2thermalized levels to the4I15/2ground state have been calibrated as a function of temperature in order to develop an optical temperature sensor both in the biological range, from 295 up to 330 K, and in the industrial application range up to 475 K. The temperature scale obtained shows a relative sensitivity with temperature of 1.1 %K−1at 300 K, and an absolute temperature sensitivity of 73 × 10−4K−1at 467 K. These results suggest that the Er3+-doped yttrium oxysulfate can be used as an optical temperature sensor by exciting in the infrared range for biomedicine and industrial applications.