About the journal

Cobiss

Hemijska industrija 2024 Volume 78, Issue 4, Pages: 351-357
https://doi.org/10.2298/HEMIND240227021C
Full text ( 994 KB)


Luminescence intensity ratio by three thermalized levels in YAG:Er3+/Yb3+ nanoparticles

Ćirić Aleksandar ORCID iD icon (Centre of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia), aleksandar.ciric@ff.bg.ac.rs
Medić Mina ORCID iD icon (Centre of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia)
Periša Jovana ORCID iD icon (Centre of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia)
Antić Željka ORCID iD icon (Centre of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia)
Dramićanin Miroslav D. ORCID iD icon (Centre of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia)

Luminescence thermometry is a remote temperature sensing method by observing temperature dependent spectral changes for temperature readout. Chase for increasing temperature readout sensitivity motivated research of employing 3rd thermalized level of Er3+ emission in Yb3+/Er3+ upconversion photoluminescence. For this purpose, highly stable and efficient yttrium aluminium garnet (YAG): Yb3+/Er3+ nanoparticles were prepared by a modified Pechini method. The emission spectra were recorded from 300 to 800 K, and two luminescence intensity ratios between emissions of 4S3/2, 2H11/2, and 4F7/2 were obtained. Apart from excellent matching theoretical predictions, the readout by using the 4F7/2 method provided a 3.5-fold increased relative sensitivity over the luminescence intensity ratio by 2H11/2 level, which is limited by being usable only above 600 K. The method by emission from 2H11/2 is to be used from 300 to 600 K, while emission from 4F7/2 provides the best luminescence intensity ratio at temperatures from 600 K to 800 K. YAG:Yb3+/Er3+ nano-particles proved to be an excellent sensor material for the luminescence intensity ratio method by employing multiple thermalized levels.

Keywords: Luminescence thermometry, upconversion nanoparticles, fluorescence intensity ratio, Pechini method

Project of the Ministry of Science, Technological Development and Innovation, Republic of Serbia, Grant no. 451-03-47/2023-01/200017


Show references