Dual-center co-doped and mixed ratiometric LuVO4:Nd3+/Yb3+nanothermometers

Ilya E Kolesnikov; Elena V Afanaseva; Mikhail A Kurochkin; Elena I Vaishlia; Evgenii Yu Kolesnikov; Erkki Lähderanta

doi:10.1088/1361-6528/ac49c3

Dual-center co-doped and mixed ratiometric LuVO₄:Nd³⁺/Yb³⁺nanothermometers

Nanotechnology. 2022 Jan 28;33(16). doi: 10.1088/1361-6528/ac49c3.

Authors

Ilya E Kolesnikov^{1

2}, Elena V Afanaseva³, Mikhail A Kurochkin¹, Elena I Vaishlia³, Evgenii Yu Kolesnikov³, Erkki Lähderanta²

Affiliations

¹ St. Petersburg State University, Universitetskaya nab. 7-9, 199034, St. Petersburg, Russia.
² LUT University, Skinnarilankatu 34, FI-53850, Lappeenranta, Finland.
³ Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya str. 29, 195251, St. Petersburg, Russia.

PMID: 35008067
DOI: 10.1088/1361-6528/ac49c3

Abstract

During last decade luminescence thermometry has become a widely studied research field due to its potential applications for real time contactless temperature sensing where usual thermometers cannot be used. Special attention is paid to the development of accurate and reliable thermal sensors with simple reading. To address existing problems of ratiometric thermometers based on thermally-coupled levels, LuVO₄:Nd³⁺/Yb³⁺thermal sensors were studied as a proof-of-concept of dual-center thermometer obtained by co-doping or mixture. Both approaches to create a dual-center sensor were compared in terms of energy transfer efficiency, relative sensitivity, and temperature resolution. Effect of excitation mechanism and Yb³⁺doping concentration on thermometric performances was also investigated. The best characteristics ofS_r = 0.34% K^-1@298 K and ΔT = 0.2 K were obtained for mixed phosphors upon host excitation.

Keywords: dual-center phosphor; lanthanides; luminescence intensity ratio; nanoparticles; optical thermometry.