Emission spectra tuning of upconverting NaGdF4:20% Yb, 2% Er nanoparticles by Cr3+ co-doping for optical temperature sensing
| Autor: | G. Pleckaityte, A. Katelnikovas, Martynas Skapas, Aldona Beganskiene, I. Mikalauskaite, Aleksej Zarkov |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Infrared Phonon Doping Biophysics Analytical chemistry Nanoparticle 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Biochemistry Atomic and Molecular Physics and Optics 0104 chemical sciences Ion Nanomaterials Emission spectrum 0210 nano-technology Luminescence |
| Zdroj: | Journal of Luminescence. 213:210-217 |
| ISSN: | 0022-2313 |
| DOI: | 10.1016/j.jlumin.2019.05.032 |
| Popis: | Upconverting (UC) nanoparticles have gained much attention due to their unique properties of converting radiation with longer wavelength (usually infrared (IR)) to emission in the visible (VIS) range. In order to obtain efficiently emitting nanomaterials, proper amounts of rare-earth (RE) elements need to be doped into matrices with low phonon energies. NaGd0.78-xF4:Yb0.2/Er0.02/Crx3+ nanoparticles were synthesized via thermal decomposition method. By varying concentration of Cr3+ a series of nanomaterials with composition of NaGd0.78-xF4:Yb0.2/Er0.02/Crx3+ were synthesized and characterized. Addition of Cr3+ ions impacts UC emission due to possible energy migration and relaxation pathways in Yb3+−Er3+−Cr3+ system. Effective energy difference was calculated from temperature dependent luminescence measurements of thermally coupled 2H11/2 and 4S3/2 levels. Values of calculated relative sensitivity (Sr = 1.12% K−1) in NaGdF4:Yb3+/Er3+ compound were slightly higher comparing to NaGd0.78-xF4:Yb0.2/Er0.02/Crx3+ samples; therefore, both systems could be considered for a possible application in luminescent temperature sensors. |
| Databáze: | OpenAIRE |
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