Improving the temperature-sensing performance of the SrZn0.33Nb0.67O3:Pr3+ phosphor via Ga3+ doping

Yan Cui,Yeqing Chen,Tao Hu,Zhichao Meng,Yan Chen,Qingguang Zeng,Yan Gao

doi:10.1039/d1ma01247a

Abstract

This work highlights a novel optical thermometric phosphor SrZn0.33Nb0.67O3:Pr3+ as well as its remarkably improved temperature-sensing performance via Ga3+ doping.

Highlights

With rapid developments in the microelectronics industry, biomedical field and scientific research, accurate temperature information acquisition with high spatio-temporal resolution has been gaining greater importance
The as-synthesized samples exhibit efficient blue and red emissions located at 491 nm (3P0 - 3H4), 619 nm (1D2 - 3H4) and 651 nm (3P0 - 3F2), and the fluorescence intensity ratio (FIR) of different 4f configuration transitions changes significantly with temperature, demonstrating that the studied material can serve as a selfcalibrated optical thermometer with good signal discrimination
The maximal Sa and Sr values reach as high as 0.035 KÀ1 (500K) and 0.83% KÀ1 (500 K) for the 6% Ga3+ co-doped sample, which are increased by five- and two-fold, respectively, compared with the undoped sample

Summary

Introduction

With rapid developments in the microelectronics industry, biomedical field and scientific research, accurate temperature information acquisition with high spatio-temporal resolution has been gaining greater importance. A study on the temperature-dependent luminescent properties of Pr3+ in SrZn0.33Nb0.67O3 will broaden the family of potential Pr3+activated optical thermometers. In this work, we chose to study a novel Pr3+-activated SrZn0.33Nb0.67O3 thermo-sensitive phosphor and investigate the significant impact of Ga3+ co-doping on the temperaturesensing performance of this material. The as-synthesized samples exhibit efficient blue and red emissions located at 491 nm (3P0 - 3H4), 619 nm (1D2 - 3H4) and 651 nm (3P0 - 3F2), and the FIR of different 4f configuration transitions changes significantly with temperature, demonstrating that the studied material can serve as a selfcalibrated optical thermometer with good signal discrimination. The temperature-sensing performance of the thermometer is improved markedly when Ga3+ is co-doped into the SrZn0.33Nb0.67O3:Pr3+ phosphor. Temperaturedependent PL spectra were measured using the abovementioned spectrophotometer, which was equipped with a temperature-controlling stage

Results and discussion

Findings

Conclusion