High-efficiency upconversion luminescence and enhanced sensitivity temperature sensing behavior in Ho3+/Yb3+ doped yttrium Oxysulfide phosphors

High-efficiency upconversion luminescence and enhanced sensitivity temperature sensing behavior in Ho3+/Yb3+ doped yttrium Oxysulfide phosphors

A series of Y2O2S: 0.25 % Ho3+/x%Yb3+ (where x = 4, 6, 8, and 10) phosphors were synthesized by using a chemical co-precipitation method, and their temperature sensing properties were systematically investigated. The upconversion luminescence (UCL) spectra of the samples were recorded under 980 nm l...

Full description

Saved in:
Bibliographic Details
Main Authors: Juan Wang, Renguang Ye, Youjie Hua, Xuejiao Wang, Tianzhi Jiang, Caixia Song, Luping Lyu, Junhao Wu, Hongping Ma, Chenxia Li, Degang Deng, Shiqing Xu
Format: Article
Language:English
Published: Elsevier 2025-07-01
Series:Results in Chemistry
Subjects:
Optical temperature sensing
Y2O2S
Upconversion luminescence
Fluorescence intensity ratio
Online Access:http://www.sciencedirect.com/science/article/pii/S2211715625004667
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A series of Y2O2S: 0.25 % Ho3+/x%Yb3+ (where x = 4, 6, 8, and 10) phosphors were synthesized by using a chemical co-precipitation method, and their temperature sensing properties were systematically investigated. The upconversion luminescence (UCL) spectra of the samples were recorded under 980 nm laser excitation. The Y2O2S: Ho3+/Yb3+ system exhibits three distinct UC emission bands in the green, red, and near-infrared regions, corresponding to the transitions of 5F4/5S2 → 5I8, 5F5 → 5I8, and 5F4/5S2 → 5I7 of Ho3+, respectively. According to the emission spectra, the sample with a Yb3+ doping concentration of 6 % exhibited the strongest luminescence intensity, with a quantum yield reaching 4.01 %. To further explore its temperature sensing properties, the fluorescence intensity ratios (FIR) of both thermally coupled energy levels (TCLs) and non-thermally coupled energy levels (NTCLs) of Ho3+ were systematically analyzed. Notably, temperature sensing materials based on NTCLs exhibit significantly enhanced sensitivity while maintaining a broad temperature measurement range. Specifically, the absolute sensitivity (SA) increased from 0.011 % to 0.498 %, representing an approximately 45-fold improvement. These findings indicate that Y2O2S: Ho3+/Yb3+ UCL materials possess excellent potential for applications in optical temperature sensing.
ISSN:2211-7156

Similar Items