NIR and visible luminescence of Er3 +/Yb3+ co-doped fluorophosphate glasses with small additives of phosphates

Колобкова, Е. В.; Alkhlef, A.; Kuzmenko, Natalia; Ходасевич, И. А.; Grabtchikov, A. S.

doi:10.1016/j.jlumin.2021.118033

Cited by 10 publications

(2 citation statements)

References 39 publications

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“…Furthermore, this matrix is thermally stable and is characterized by a high thermal conductivity . Thus far, several reports showing the UC luminescence of SrF 2 -containing Er 3+ ions have been published; however, they are focused on the materials codoped with Yb 3+ ions in bulk − and nano , scale, excited at around 975 nm. The UC properties of the systems doped only with Er 3+ ions were investigated only for oxyfluoride glasses, ceramics, or glass–ceramics containing SrF 2 :Er 3+ NPs excited by the 980 nm wavelength, − or bulk materials excitable via 975 , and 1530 − nm wavelengths.…”

Section: Introductionmentioning

confidence: 99%

Upconverting SrF₂:Er³⁺ Nanoparticles for Optical Temperature Sensors

Ryszczyńska

Trejgis

Marciniak

et al. 2021

ACS Appl. Nano Mater.

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The upconversion (UC) phenomenon is one of the most frequently investigated in lanthanide ions (Ln 3+ )-doped phosphors. Usually, to obtain UC luminescence, two types of dopants are used: one is a sensitizer, and the other one is an activator, e.g., Yb 3+ /Er 3+ . Exceptional UC luminescence can also be presented by systems doped with one type of Ln 3+ ions, which are characterized by self-sensitization properties, for instance, Er 3+ ions. Herein, the structural and spectroscopic properties of SrF 2 nanoparticles (NPs) doped with Er 3+ ions in concentration from 2.1 to 29.0% were investigated. The SrF 2 :Er 3+ samples, synthesized using the hydrothermal method, were characterized by the crystalline structure and sizes of their formed NPs below 18 nm. The UC emission under 975 and 1532 nm excitations was observed, wherein the most intense luminescence was registered for SrF 2 :11.7% Er 3+ NPs under 975 nm excitation and for SrF 2 :4.7%Er 3+ NPs under 1532 nm excitation. The UC mechanisms were proposed on the basis of the measured dependencies of integral luminescence intensities on the laser power densities and luminescence lifetimes. The thermometric properties of ratiometric luminescent thermometers based on luminescence intensity ratios (LIRs) from 2 H 11/2 and 4 S 3/2 thermally coupled levels in SrF 2 :Er 3+ were evaluated in the 273−373 K temperature range. The interesting temperature dependencies of the UC emission from 4 I 9/2 and 4 I 11/2 states were registered; these have not been previously reported.

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