掺 Sm 和 Tb 的 CaMoO 荧光粉的光学性质及其温度传感性能。

Optical properties of Sm and Tb co-doped CaMoO phosphor for temperature sensing.

机构信息

Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2019 May 5;214:537-543. doi: 10.1016/j.saa.2019.02.049. Epub 2019 Feb 18.

DOI:10.1016/j.saa.2019.02.049

PMID:30822673

Abstract

We prepared CaMoO: x%Sm, 5%Tb (x = 0.1, 0.5, 1, 2) phosphors by a precipitation method. Based on the diversity in thermal quenching behavior of different ions in molybdate, a novel thermometry strategy has been proposed. The fluorescence intensity ratio (FIR) of Sm to Tb in these composites exhibits remarkable temperature dependence due to the diverse thermal quenching behaviors of Sm and Tb ions. Excellent temperature sensitivity was achieved from 293 K to 593 K, suggesting that these can perform thermometry. The sensitivities increase with Sm concentration. The maximum sensitivity is as high as 0.312 K (at 593 K) when the Sm concentration is 2%. However, the low Sm concentration sample has a greater relative sensitivity; the maximum value is as high as 0.019 K (at 460 K) when the Sm concentration is 0.1%. Lower Sm concentrations suggested a greater range of luminescent color changes with temperature. Thus, the sample with less Sm can measure temperature via luminescent color.

摘要

我们采用沉淀法制备了 CaMoO: x%Sm, 5%Tb（x = 0.1, 0.5, 1, 2）荧光粉。基于钼酸盐中不同离子热猝灭行为的多样性，提出了一种新的测温策略。由于 Sm 和 Tb 离子的热猝灭行为不同，这些复合材料中 Sm 对 Tb 的荧光强度比（FIR）表现出显著的温度依赖性。从 293 K 到 593 K ，这些复合材料表现出优异的温度敏感性，表明其可以进行测温。灵敏度随 Sm 浓度的增加而增加。当 Sm 浓度为 2%时，灵敏度最高可达 0.312 K（在 593 K 时）。然而，低 Sm 浓度样品具有更高的相对灵敏度；当 Sm 浓度为 0.1%时，其最高值高达 0.019 K（在 460 K 时）。较低的 Sm 浓度意味着在温度变化时发光颜色的变化范围更大。因此，低 Sm 浓度的样品可以通过发光颜色来测量温度。