Improved relative temperature sensitivity of over 10% K<sup>−1</sup> in fluoride nanocrystals <i>via</i> engineering the interfacial layer

Liu, Enyang; Lei, Lei; Ye, Renguang; Deng, Degang; Xu, Shiqing

doi:10.1039/d2cc02548e

Cited by 4 publications

(2 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the intensity variation with increasing the temp from 293 to 443 K at λ ex =380 nm, the atoms at the 4 S 3/2 level will be activated and move to a higher level which leads to changes in the FIR value. The Boltzmann distribution theory was used to determine the FIR for TCELs of Er 3+ ion [15,62,63]

\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr FIR={{{I}_{0}}\over{I}}=Aexp\ \left({{{\Delta E}_{TCEL}}\over{{k}_{B}T}}\right)\hfill\cr}}

…”

Section: Resultsmentioning

confidence: 99%

Green Emission of Erbium Doped SYW Phosphors for Optical Thermometry And Solid‐State Lighting

Kumari,

Rao,

Sinha

2024

ChemPhotoChem

View full text Add to dashboard Cite

A series of Er3+ ions doped Sr9Y2W4O24 (SYW) phosphors have been synthesised using solid‐state reaction technique. For optical thermometry and solid state lighting applications, the crystal structure, morphological, and luminescence features of the SYW: Er3+ phosphors were explored. X‐ray diffraction (XRD) reveal that synthesised phosphors having single phase with a tetragonal crystal structure and I41/a space group. SEM was used to examine the morphological behaviour and presence of composition elements. The optical bandgap of the phosphor was evaluated using UV‐Vis diffuse reflection spectra (DRS). The photoluminescence (PL) emission spectra were captured under 380 nm excitation, and the peak with the maximum intensity was identified at 563 nm ascribed to transition 4S3/2 →4I15/2, that emits green color in visible region. The temperature dependent PL (TD‐PL) spectra show that SYW phosphor is substantially more thermally stable, having thermal activation energy of about 0.247 eV. Additionally, the fluorescence intensity ratio (FIR) was used to study the optical sensing characteristics of the thermal quenching transitions (2H11/2, 4S3/2) with maximum relative sensitivity (SR) and an absolute sensitivity (SA) being 1.33% K−1and 0.307% K‐1, respectively. All of the aforementioned findings demonstrate that SYW: Er3+ phosphors have potential for optical thermometry and other photonic devices.

show abstract

\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr FIR={{{I}_{0}}\over{I}}=Aexp\ \left({{{\Delta E}_{TCEL}}\over{{k}_{B}T}}\right)\hfill\cr}}

…”

Section: Resultsmentioning

confidence: 99%

Green Emission of Erbium Doped SYW Phosphors for Optical Thermometry And Solid‐State Lighting

Kumari,

Rao,

Sinha

2024

ChemPhotoChem

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5][6][7][8][9][10] In numerous application fields, most temperature sensors are required to have the characteristics of high sensitivity, high precision, and high timeliness. [11][12][13][14][15][16][17][18][19][20] With the continuous expansion of the application range of temperature measurement, conventional temperature sensors no longer meet the requirements of many fields, especially in the high-tech field. Therefore, expanding our knowledge to complex and submicron environments is of great value for the innovation of temperature detection.…”

Section: Introductionmentioning

confidence: 99%

Multiple fluorescence-temperature feedback in Y₇O₆F₉:Er/Yb crystal-embedded polyacrylonitrile fibers

Liu

Zhao

et al. 2023

New J. Chem.

View full text Add to dashboard Cite

show abstract

Optical Temperature Sensing and Bioimaging of Aquatic Invertebrates With Nd³⁺‐ Sensitized Core@Shell Nanoparticles

Przybylska,

Jurga,

Ekner‐Grzyb

et al. 2024

Advanced Optical Materials

View full text Add to dashboard Cite

In biomedical and optical applications, multifunctional upconverting nanoparticles (UCNPs) play an essential role where non‐invasive temperature sensing and imaging are necessary. UCNPs smaller than 20 nm, which can be excited under 808 nm wavelength, are particularly promising in this area and can be implemented in humans or other mammals. However, new versatile nanoprobes are still needed for biology, especially for challenging studies of small aquatic invertebrates. Such tools allow better monitoring and understanding of their physiology, biochemistry, and ecological responses, which is crucial due to the growing pollution of water reservoirs and climate change. Herein, multifunctional NaYF4:Yb3+, Er3+@NaNdF4:Yb3+ core@shell NPs (15 nm), forming stable aqueous colloids, exhibiting intense emissions under excitation in the first biological window (808 nm), and presenting high thermal sensitivity and resolution related to the thermally coupled energy levels of Er3+ ions, are designed and synthesized. Such properties of UCNPs are further utilized for optical imaging of aquatic invertebrates (Daphnia magna) and temperature detection inside their bodies under 808 nm excitation. This pioneering application of NaYF4:Yb3+, Er3+@NaNdF4:Yb3+ demonstrates the high potential of developed UCNPs for multifunctional applications, especially for bioimaging and temperature sensing within whole organisms.

show abstract

Improved relative temperature sensitivity of over 10% K⁻¹ in fluoride nanocrystals via engineering the interfacial layer

Abstract: Real-time in-situ temperature sensing is of significance in bio-medical field, however, the low relative temperature sensitivity Sr is one of the major obstacles in the development of nanothermometers. Herein, we...

Cited by 4 publications

References 39 publications

Green Emission of Erbium Doped SYW Phosphors for Optical Thermometry And Solid‐State Lighting

Green Emission of Erbium Doped SYW Phosphors for Optical Thermometry And Solid‐State Lighting

Multiple fluorescence-temperature feedback in Y₇O₆F₉:Er/Yb crystal-embedded polyacrylonitrile fibers

Optical Temperature Sensing and Bioimaging of Aquatic Invertebrates With Nd³⁺‐ Sensitized Core@Shell Nanoparticles

Contact Info

Product

Resources

About

Improved relative temperature sensitivity of over 10% K−1 in fluoride nanocrystals via engineering the interfacial layer

Abstract: Real-time in-situ temperature sensing is of significance in bio-medical field, however, the low relative temperature sensitivity Sr is one of the major obstacles in the development of nanothermometers. Herein, we...

Cited by 4 publications

References 39 publications

Green Emission of Erbium Doped SYW Phosphors for Optical Thermometry And Solid‐State Lighting

Green Emission of Erbium Doped SYW Phosphors for Optical Thermometry And Solid‐State Lighting

Multiple fluorescence-temperature feedback in Y7O6F9:Er/Yb crystal-embedded polyacrylonitrile fibers

Optical Temperature Sensing and Bioimaging of Aquatic Invertebrates With Nd3+‐ Sensitized Core@Shell Nanoparticles

Contact Info

Product

Resources

About

Improved relative temperature sensitivity of over 10% K⁻¹ in fluoride nanocrystals via engineering the interfacial layer

Multiple fluorescence-temperature feedback in Y₇O₆F₉:Er/Yb crystal-embedded polyacrylonitrile fibers

Optical Temperature Sensing and Bioimaging of Aquatic Invertebrates With Nd³⁺‐ Sensitized Core@Shell Nanoparticles