Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia.
Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
Sensors (Basel). 2023 Apr 9;23(8):3839. doi: 10.3390/s23083839.
Herein, we investigate the performance of single- and multiparametric luminescence thermometry founded on the temperature-dependent spectral features of CaBaPO:Mn near-infrared emission. The material was prepared by a conventional steady-state synthesis, and its photoluminescence emission was measured from 7500 to 10,000 cm over the 293-373 K temperature range in 5 K increments. The spectra are composed of the emissions from E → A and T → A electronic transitions and Stokes and anti-Stokes vibronic sidebands at 320 cm and 800 cm from the maximum of E → A emission. Upon temperature increase, the T and Stokes bands gained in intensity while the maximum of E emission band is redshifted. We introduced the procedure for the linearization and feature scaling of input variables for linear multiparametric regression. Then, we experimentally determined accuracies and precisions of the luminescence thermometry based on luminescence intensity ratios between emissions from the E and T states, between Stokes and anti-Stokes emission sidebands, and at the E energy maximum. The multiparametric luminescence thermometry involving the same spectral features showed similar performance, comparable to the best single-parameter thermometry.
在此，我们研究了基于 CaBaPO:Mn 近红外发射的温度相关光谱特性的单参数和多参数发光测温的性能。该材料通过传统的稳态合成制备，并在 5 K 的增量范围内，在 293-373 K 的温度范围内，从 7500 到 10000 cm 测量其光致发光发射。光谱由 E→A 和 T→A 电子跃迁的发射以及在 E→A 发射最大值处的 320 cm 和 800 cm 的斯托克斯和反斯托克斯振子边带组成。随着温度的升高，T 和斯托克斯带的强度增加，而 E 发射带的最大值发生红移。我们介绍了用于线性化和特征缩放输入变量的线性多参数回归的过程。然后，我们基于 E 和 T 态发射之间、斯托克斯和反斯托克斯发射边带之间以及 E 能量最大值处的发光强度比，实验确定了基于发光强度的测温的准确性和精密度。涉及相同光谱特征的多参数发光测温表现相似，与最佳单参数测温相当。
