abstract
The growing interest in the use of luminescence thermometry for noncontact temperature reading under very specific conditions imposes the need to develop an approach allowing modification of the luminescence parameters of a thermometer accordingly to requirements. Therefore, in response to these expectations, this manuscript reports an approach to modulate the spectral position and luminescence thermal quenching rate of Fe3+ ions by modifying the crystal field strength and the host material composition of nanocrystalline AB(2)O(4) type nanocrystals (A = Mg, Ca; B = Al, Ga). It was proved that in a group of MgAl2O4, MgGa2O4, CaAl2O4, and CaGa2O4 nanocrystals doped with Fe3+ ions, the emission spectral range, as well as the relative thermal sensitivity (from 0.2%/degrees C for MAO to 2.07%/degrees C for CGO) and the operating temperature range, can be easily modified by the host material composition. For instance, a maximal relative thermal sensitivity of 2.58%/degrees C is obtained for Fe3+, Tb3+ co-doped CaAl2O4 nanocrystals. The proposed approach is a step toward the intentional designing of a highly sensitive luminescence thermometer.
keywords
PERSISTENT LUMINESCENCE; GRAIN-SIZE; CR3+; PHOSPHOR; IONS; EU3+; NANOPHOSPHORS; NANOPARTICLES; SENSITIVITY; AFTERGLOW
subject category
Materials Science, Multidisciplinary; Physics, Applied
authors
Kniec, K; Piotrowski, W; Ledwa, K; Carlos, LD; Marciniak, L
our authors
Luís Carlos
Full professorProjects
Nanoparticles - based 2D thermal bioimaging technologies - NanoTBTech (NanoTBTech)
acknowledgements
The authors would like to acknowledge the reviewers of the manuscript for their substantial contribution to the interpretation of the described results. The High sensitive thermal imaging for biomedical and microelectronic application project is carried out within the First Team programme of the Foundation for Polish Science co-financed by the European Union under the European Regional Development Fund. The financial support from the European Union's Horizon 2020 FET Open program under grant agreement no. 801305 is acknowledged. LDC thanks the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by Portuguese funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement.