980 nm excited Er 3+ /Yb 3+ /Li + /Ba 2+ : NaZnPO 4 upconverting phosphors in optical thermometry

Mukhopadhyay, Lakshmi; Kumar, Vineet; Bokolia, Renuka; Sreenivas, K.

doi:10.1016/j.jlumin.2017.03.035

Cited by 100 publications

(37 citation statements)

References 73 publications

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“…Although other lanthanides and co‐doped lanthanide (e.g. Er 3+ /Yb 3+ ) materials such as MOFs are often reported, our dppz‐vSilica@Eu,Tb material shows promising performance as a ratiometric luminescence thermometer …”

Section: Resultsmentioning

confidence: 96%

Luminescent thermometer based on Eu³⁺/Tb³⁺‐organic‐functionalized mesoporous silica

et al. 2018

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In this work we investigate a mesoporous silica (MS) decorated with dipyridyl-pyridazine (dppz) ligands and further grafted with a mixture of Eu /Tb ions (28.45%:71.55%), which was investigated as a potential thermometer in the 10-360 K temperature range. The MS material was prepared employing a hetero Diels-Alder reaction: 3,6-di(2-pyridyl)-1,2,4,5-tetrazine was reacted with the double bonds of vinyl-silica (vSilica) followed by an oxidation procedure. We explore using the dppz-vSilica material to obtain visible emitting luminescent materials and for obtaining a luminescent thermometer when grafted with Eu /Tb ions. For the dppz-vSilica@Eu,Tb material absolute sensitivity S of 0.011 K (210 K) and relative sensitivity S of 1.32 %K (260 K) were calculated showing good sensing capability of the material. Upon temperature change from 10 K to 360 K the emission color of the material changed gradually from yellow to red.

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Section: Resultsmentioning

confidence: 96%

Luminescent thermometer based on Eu³⁺/Tb³⁺‐organic‐functionalized mesoporous silica

et al. 2018

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“…[Si 6 O 18 ] 12À unit bridges between adjacent inorganic rareearth oxide chains forming the dense crystal structure of 1 Figure 2), while Na + cations occupy the smaller interstices between units. K + cations interact more strongly than Na + with the anionic [(Yb 2.77 Er 0.23 )Si 6 O 18 ] n 3nÀ framework:w hile the former interact with ten framework oxygen atoms,w ith K···O distances in the 2.823(13)-3.460 (12) range,N a + cations interacto nly with five oxygen atoms, with Na···O distances in the 2.220(14)-2.579(13) range.…”

Section: Crystals Tructurementioning

confidence: 99%

“…4 I 15/2 Er 3 + emissions as the thermometric parameter. [4][5][6][7][8][9][10][11][12][13][14][15] Near infra-red luminescence is particularly relevant for optical sensing because it can be used more efficiently in biological media due to deep tissue penetration and negligible autofluorescence. [16] Following this idea, in the past few years, several near-infrared Ln 3 + thermometers have been reportedf or the biological temperature range (298-323K), based on Nd 3 + and/or Yb 3 + ,o perating in the so called first (700-980 nm) and second (1000-1400 nm) biological windows.…”

mentioning

confidence: 99%

Near‐Infrared Ratiometric Luminescent Thermometer Based on a New Lanthanide Silicate

Ananias

Paz

Carlos

et al. 2018

Chemistry A European J

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A new lanthanide silicate system, Na K[Ln Si O ] (Ln=Lu, Yb/ Er, Lu/Eu, or Lu/Yb/Er), comprising microcrystals embedded in an amorphous siliceous matrix, obtained by sintering at 1373 K a Na K[Ln Si O ]⋅3 H O nano-crystalline precursor, is reported. The crystal structure of these lanthanide silicates was solved from high-resolution synchrotron power X-ray diffraction data collected at 110 K, and further supported by Si MAS NMR and Eu luminescence. The materials crystallize in the Pī triclinic centrosymmetric space group, exhibiting a dense framework consisting of hexameric [Si O ] cyclosilicate units, and chains of two distinct {LnO } octahedra. Na K[(Lu Yb Er ) Si O ] is the first example of a lanthanide silicate operative as a near-infrared ratiometric luminescent thermometer, with good sensitivity at cryogenic temperatures (<100 K). Upon excitation at 903 nm, the ratio between the F → F (Yb ) and I → I (Er ) emissions was used for sensing temperature in the 12-450 K range, reaching a maximum thermal sensitivity of 2.6 % K at 26.8 K.

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“…In this case, the FIR of the two thermally coupled levels can be fitted well by Boltzmann equation and then the temperature measurement can be realized. There are a series of thermally coupled energy levels existing in rare‐earth ions, such as Er 3+ : 2 H 11/2 / 4 S 3/2 levels, Tm 3+ : 3 F 2,3 / 3 H 4 levels, Eu 3+ : 5 D 0 / 5 D 1 levels, etc…”

Section: Introductionmentioning

confidence: 99%

“…20 In this case, the FIR of the two thermally coupled levels can be fitted well by Boltzmann equation and then the temperature measurement can be realized. There are a series of thermally coupled energy levels existing in rare-earth ions, such as Er 3+ : 2 H 11/2 / 4 S 3/2 levels, Tm 3+ : 3 F 2,3 / 3 H 4 levels, Eu 3+ : 5 D 0 / 5 D 1 levels, etc [21][22][23][24][25][26][27] In this paper, CaO-Y 2 O 3 : Yb 3+ /Er 3+ were synthesized using a conventional high temperature solid state method. Yb 3+ ions and Er 3+ ions were selected as the sensitizers and activators respectively to use for temperature measurement, aimed at providing a real-time optical thermometry during the preparation process of titanium alloys.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional optical thermometry based on the stark sublevels of Er³⁺ in CaO‐Y₂O₃: Yb³⁺/Er³⁺

et al. 2019

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A conventional high temperature solid state method was utilized to prepare CaO-Y 2 O 3 , which is a potential candidate for manufacturing crucible material to melt titanium and titanium alloys with low cost. Meanwhile, Yb 3+ ions and Er 3+ ions were selected as the sensitizers and activators respectively to dope into CaO-Y 2 O 3 , aimed at providing real-time optical thermometry during the preparation process of titanium alloys realized using fluorescence intensity ratio (FIR) technology. The results reveal that a high measurement precision can be acquired by using the Stark sublevels of Er 3+ 4 F 9/2 to measure the temperature with a maximum absolute error of only about 3 K. In addition, by analyzing the dependence of 4 I 13/2 → 4 I 15/2 transition on pump power of 980 nm excitation wavelength, it was found that the laser-induced thermal effect has almost no influence on the temperature measurement conducted by using the FIR of the Stark sublevels of Er 3+ 4 I 13/2 , which means that a high excitation pump power can be used to obtain strong NIR emission and good signal-to-noise ratio for optical thermometry without the influence of the laser-induced thermal effect. All the results reveal that CaO-Y 2 O 3 : Yb 3+ /Er 3+ is an excellent temperature sensing material with high measurement precision. K E Y W O R D Sfluorescence intensity ratio, optical thermometry, upconversion, Yb 3+ /Er 3+

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980 nm excited Er 3+ /Yb 3+ /Li + /Ba 2+ : NaZnPO 4 upconverting phosphors in optical thermometry

Cited by 100 publications

References 73 publications

Luminescent thermometer based on Eu³⁺/Tb³⁺‐organic‐functionalized mesoporous silica

Luminescent thermometer based on Eu³⁺/Tb³⁺‐organic‐functionalized mesoporous silica

Near‐Infrared Ratiometric Luminescent Thermometer Based on a New Lanthanide Silicate

Multifunctional optical thermometry based on the stark sublevels of Er³⁺ in CaO‐Y₂O₃: Yb³⁺/Er³⁺

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980 nm excited Er 3+ /Yb 3+ /Li + /Ba 2+ : NaZnPO 4 upconverting phosphors in optical thermometry

Cited by 100 publications

References 73 publications

Luminescent thermometer based on Eu3+/Tb3+‐organic‐functionalized mesoporous silica

Luminescent thermometer based on Eu3+/Tb3+‐organic‐functionalized mesoporous silica

Near‐Infrared Ratiometric Luminescent Thermometer Based on a New Lanthanide Silicate

Multifunctional optical thermometry based on the stark sublevels of Er3+ in CaO‐Y2O3: Yb3+/Er3+

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Luminescent thermometer based on Eu³⁺/Tb³⁺‐organic‐functionalized mesoporous silica

Luminescent thermometer based on Eu³⁺/Tb³⁺‐organic‐functionalized mesoporous silica

Multifunctional optical thermometry based on the stark sublevels of Er³⁺ in CaO‐Y₂O₃: Yb³⁺/Er³⁺