Back to Search Start Over

Implementing Defects for Ratiometric Luminescence Thermometry

Authors :
Joanna Drabik
Karolina Ledwa
Łukasz Marciniak
Source :
Nanomaterials, Vol 10, Iss 7, p 1333 (2020)
Publication Year :
2020
Publisher :
MDPI AG, 2020.

Abstract

In luminescence thermometry enabling temperature reading at a distance, an important challenge is to propose new solutions that open measuring and material possibilities. Responding to these needs, in the nanocrystalline phosphors of yttrium oxide Y2O3 and lutetium oxide Lu2O3, temperature-dependent emission of trivalent terbium Tb3+ dopant ions was recorded at the excitation wavelength 266 nm. The signal of intensity decreasing with temperature was monitored in the range corresponding to the 5D4 → 7F6 emission band. On the other hand, defect emission intensity obtained upon 543 nm excitation increases significantly at elevated temperatures. The opposite thermal monotonicity of these two signals in the same spectral range enabled development of the single band ratiometric luminescent thermometer of as high a relative sensitivity as 4.92%/°C and 2%/°C for Y2O3:Tb3+ and Lu2O3:Tb3+ nanocrystals, respectively. This study presents the first report on luminescent thermometry using defect emission in inorganic phosphors.

Details

Language :
English
ISSN :
20794991
Volume :
10
Issue :
7
Database :
Directory of Open Access Journals
Journal :
Nanomaterials
Publication Type :
Academic Journal
Accession number :
edsdoj.98712f1cd732400495f7a8ab2580a20f
Document Type :
article
Full Text :
https://doi.org/10.3390/nano10071333