Synthesis and up-conversion of core/shell SrF2:Yb3+,Er3+@SrF2:Yb3+,Nd3+ nanoparticles under 808, 975, and 1532 nm excitation wavelengths

Przybylska, Dominika; Grzyb, Tomasz

doi:10.1016/j.jallcom.2020.154797

Cited by 26 publications

(19 citation statements)

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“…19 A good example of a fluoride host for Ln 3+ ions is SrF 2 , known for its good optical properties and possibility to be obtained as NPs. 4 Furthermore, this matrix is thermally stable and is characterized by a high thermal conductivity. 19 Thus far, several reports showing the UC luminescence of SrF 2containing Er 3+ ions have been published; however, they are focused on the materials codoped with Yb 3+ ions in bulk 20−25 and nano 20,26 scale, excited at around 975 nm.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Moreover, we have proven that core@shell NPs can also be synthesized using this method. 4 Materials containing only one type of Ln 3+ ions can be characterized by the unique and important optical properties. In these compounds, nonradiative quenching 39 competes with self-sensitization processes improving the UC intensity.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The Ln 3+ optical properties result from the 4f electronic structure, particularly from the large number of well-defined energy levels, narrow absorption and emission bands, the large energy difference between the absorption and the emission maximum, and the long luminescence lifetimes . The unique properties of upconverting Ln 3+ -doped materials have resulted in the use of these materials in many areas such as solar cells, displays, lasers, pressure or temperature sensors, , security markers, and fingerprint identification . Furthermore, the development of nanotechnology has enabled the sequent applications of new UC materials, particularly in medicine.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Upconverting SrF₂:Er³⁺ Nanoparticles for Optical Temperature Sensors

Ryszczyńska

Trejgis

Marciniak

et al. 2021

ACS Appl. Nano Mater.

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“…For Er 3+ singly doped ZGGO: nanoparticles, many sharp peaks, located at ~378, 405, 442, 450, 487, 521, 543, 653, and 802 nm can be observed. They were assigned to the transitions of 4 I 15/2 → 4 G 11/2 , 2 H 9/2 , 4 F 3/2,5/2,7/2 , 2 H 11/2 , 4 S 3/2 , 4 F 9/2 , and 4 I 9/2 of Er 3+ ions 34–38 . For Cr 3+ singly doped ZGGO:Cr 3+ nanoparticles, two obvious absorption bands at ~420 and ~565 nm can be found, and they were assigned to the transitions of 4 A 2 → 4 T 1 ( 4 F) and 4 T 2 ( 4 F) of Cr 3+ ions.…”

Section: Resultsmentioning

confidence: 97%

NIR‐I/III afterglow induced by energy transfers between Er and Cr codoped in ZGGO nanoparticles for potential bioimaging

et al. 2021

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Herein, Cr3+ and Er3+ codoped zinc gallogermanate (ZGGO) nanoparticles with average size of ~60 nm was synthesized via a hydrothermal path. It was found that near infrared (NIR)‐III (~1540 nm) afterglow was realized in ZGGO:Cr3+,Er3+ nanoparticles based on the successive energy transfer (ET) from Cr3+ to Er3+ after the stoppage of low‐dose (60 mSv) X‐ray irradiation. Meanwhile, the upconverted afterglow at 696 nm was produced via the ET from Er3+ to Cr3+ under different NIR light (808, 980, and 1532 nm) irradiations. Our results demonstrated that an X‐ray pre‐irradiation and a subsequent 980‐nm light re‐excitation might be a good strategy for realizing potential bioimaging. In particular, local‐tissue NIR‐I afterglow imaging using Cr3+ and Er3+ codoped ZGGO nanoparticles can be easily acquired by one‐step 980‐nm laser radiation. Furthermore, NIR‐I/III afterglow mechanisms of ZGGO:Cr3+,Er3+ nanoparticles after stopping X‐ray or different NIR lights (808, 980, and 1532 nm) irradiations were given.

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“…23 As we have proven here, Er 3+ and Tm 3+ can be alternatives for Nd 3+ ions for sensitization at 808 nm, without any necessity of separation of sensitizers from emitting ions, as in the case of Nd 3+ -doped materials. 60 3.2.2. 975 nm excitation.…”

Section: Spectroscopic Propertiesmentioning

confidence: 99%

Manipulation of up-conversion emission in NaYF₄core@shell nanoparticles doped by Er³⁺, Tm³⁺, or Yb³⁺ions by excitation wavelength—three ions—plenty of possibilities

et al. 2021

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Synthesis and up-conversion of core/shell SrF2:Yb3+,Er3+@SrF2:Yb3+,Nd3+ nanoparticles under 808, 975, and 1532 nm excitation wavelengths

Cited by 26 publications

References 74 publications

Upconverting SrF₂:Er³⁺ Nanoparticles for Optical Temperature Sensors

Upconverting SrF₂:Er³⁺ Nanoparticles for Optical Temperature Sensors

NIR‐I/III afterglow induced by energy transfers between Er and Cr codoped in ZGGO nanoparticles for potential bioimaging

Manipulation of up-conversion emission in NaYF₄core@shell nanoparticles doped by Er³⁺, Tm³⁺, or Yb³⁺ions by excitation wavelength—three ions—plenty of possibilities

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Synthesis and up-conversion of core/shell SrF2:Yb3+,Er3+@SrF2:Yb3+,Nd3+ nanoparticles under 808, 975, and 1532 nm excitation wavelengths

Cited by 26 publications

References 74 publications

Upconverting SrF2:Er3+ Nanoparticles for Optical Temperature Sensors

Upconverting SrF2:Er3+ Nanoparticles for Optical Temperature Sensors

NIR‐I/III afterglow induced by energy transfers between Er and Cr codoped in ZGGO nanoparticles for potential bioimaging

Manipulation of up-conversion emission in NaYF4core@shell nanoparticles doped by Er3+, Tm3+, or Yb3+ions by excitation wavelength—three ions—plenty of possibilities

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Upconverting SrF₂:Er³⁺ Nanoparticles for Optical Temperature Sensors

Upconverting SrF₂:Er³⁺ Nanoparticles for Optical Temperature Sensors

Manipulation of up-conversion emission in NaYF₄core@shell nanoparticles doped by Er³⁺, Tm³⁺, or Yb³⁺ions by excitation wavelength—three ions—plenty of possibilities