Er3+–Yb3+ doped vanadate nanocrystals: A highly sensitive thermographic phosphor and its optical nanoheater behavior

Mahata, Manoj Kumar; Kumar, Kaushal; Kr., Vineet

doi:10.1016/j.snb.2014.12.039

Cited by 194 publications

(52 citation statements)

References 37 publications

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“…. Thus the temperature sensor developed in the present work has the highest thermal sensitivity compared to other materials918242627282930314142434445. If we compare the results of decay time, rise time and FIR studies of the present material then two different types of behavior of sensitivity is observed.…”

Section: Resultsmentioning

confidence: 76%

“…As the temperature increases the population of the 5 F 4 level (541 nm emitting band) increases and the fluorescence from this level increases gradually. The FIR technique uses the intensity ratio of two separate fluorescence wavelengths emitted from two closely spaced thermally coupled levels2425262728424344.…”

Section: Resultsmentioning

confidence: 99%

“…In this paper, the temperature sensing performance has been determined through fluorescence intensity ratio, decay time and rise time methods. The FIR method is widely followed and studied in many previous works2425262728. But less work is available in literature since the first promising report was published on temperature sensing considering the rise time and to the best of our knowledge, there are only three reports till today293031.…”

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confidence: 99%

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Demonstration of Temperature Dependent Energy Migration in Dual-Mode YVO4: Ho3+/Yb3+ Nanocrystals for Low Temperature Thermometry

Mahata

Koppe

Kumar

et al. 2016

Sci Rep

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A dual mode rare-earth based vanadate material (YVO4: Ho3+/Yb3+), prepared through ethylene glycol assisted hydrothermal method, demonstrating both downconversion and upconversion, along with systematic investigation of the luminescence spectroscopy within 12–300 K is presented herein. The energy transfer processes have been explored via steady-state and time-resolved spectroscopic measurements and explained in terms of rate equation description and temporal evolution below room temperature. The maximum time for energy migration from host to rare earth (Ho3+) increases (0.157 μs to 0.514 μs) with the material’s temperature decreasing from 300 K to 12 K. The mechanism responsible for variation of the transients’ character is discussed through thermalization and non-radiative transitions in the system. More significantly, the temperature of the nanocrystals was determined using not only the thermally equilibrated radiative intra-4f transitions of Ho3+ but also the decay time and rise time of vanadate and Ho3+ energy levels. Our studies show that the material is highly suitable for temperature sensing below room temperature. The maximum relative sensor sensitivity using the rise time of Ho3+ energy level (5F4/5S2) is 1.35% K−1, which is the highest among the known sensitivities for luminescence based thermal probes.

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Section: Resultsmentioning

confidence: 76%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Demonstration of Temperature Dependent Energy Migration in Dual-Mode YVO4: Ho3+/Yb3+ Nanocrystals for Low Temperature Thermometry

Mahata

Koppe

Kumar

et al. 2016

Sci Rep

Self Cite

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“…[1][2][3][4][5][6] Generally, optical parameters, such as the fluorescence intensity, the peak wavelength, the emission bandwidth, the fluorescence intensity ratio (FIR) as well as the fluorescence lifetime, can be adopted to detect temperature. [7][8][9][10][11][12] Unfortunately, the fluorescence intensity, the peak wavelength and the emission bandwidth are strongly affected by the external factor, such as light source, atmosphere and pressure. In contrast, FIR-based temperature sensors exhibit a high measurement accuracy and reliability because FIR is independent of spectral losses and fluctuations in the excitation density.…”

Section: Introductionmentioning

confidence: 99%

Dual-Phase Glass Ceramic: Structure, Dual-Modal Luminescence, and Temperature Sensing Behaviors

Chen

Wan

Zhou

et al. 2015

ACS Appl. Mater. Interfaces

260

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Yb(3+)/Er(3+)/Cr(3+) triply doped transparent bulk glass ceramic containing orthorhombic YF3 and cubic Ga2O3 nanocrystals was fabricated by a melt-quenching route to explore its possible application in optical thermometry with high spatial and temperature resolution. It was experimentally observed that Yb(3+)/Er(3+) ions incorporated into the precipitated YF3 nanophase, while Cr(3+) ions partitioned into the crystallized Ga2O3 nanophase after glass crystallization. Importantly, such spatial isolation strategy efficiently suppressed adverse energy transfer among different active ions. As a consequence, intense green anti-Stokes luminescence originated from Er(3+): (2)H11/2,(4)S3/2 → (4)I15/2 transitions, and deep-red Stokes luminescence transitions assigned to Cr(3+): (2)E → (4)A2 radiation were simultaneously realized. Impressively, the intermediate crystal-field environment for Cr(3+) in Ga2O3 made it possible for lifetime-based temperature sensing owing to the competition of radiation transitions from the thermally coupled Cr(3+) (2)E and (4)T2 excited states. In the meantime, the low-phonon-energy environment for Er(3+) in YF3 was beneficial for upconversion fluorescence intensity ratio-based temperature sensing via thermal population between the (2)H11/2 state and (4)S3/2 state. The Boltzmann distribution theory and the two-level kinetic model were adopted to interpret these temperature-dependent luminescence of Er(3+) and Cr(3+), respectively, which gave the highest temperature sensitivities of 0.25% K(-1) at 514 K for Er(3+) and 0.59% K(-1) at 386 K for Cr(3+).

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“…Radiation thermometry using infrared photodetectors offers a truly contactless technique and does not require multiple optical components, enabling the convenient detection of temperature. However, it cannot be used in glass, liquids, materials with no emissivity and the cost of this technique is high [3][4][5][6][7]. Accordingly, the fluorescence based technique has been the focus of attention in recent decades for its feasibility in the above mentioned occasions, and it only needs the as-prepared functional materials to be contacted with or be injected into the object of interest [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Valley-to-peak intensity ratio thermometry based on the red upconversion emission of Er^3+

Zheng

et al. 2016

Opt. Express

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Upon 976 nm diode laser excitation, the temperature dependence of the red upconversion emission of Er³⁺ in CaWO₄:Yb³⁺/Er³⁺ phosphor was studied from 298 to 478 K. The spectrum was verified to consist of two Stark components originating from two Stark sublevels of ⁴F_9/2 excited state to ⁴I_15/2 ground state of Er³⁺. The valley-to-peak intensity ratio (VPR) of this double-peak spectrum was found to increase linearly with the rise of temperature. The maximum relative sensitivity of this VPR method was obtained to be about 0.20% K^-1 at 298 K. Moreover, a study on the power dependence was also performed, suggesting that VPR method is immune to the pump power and is thus suitable for monitoring the temperature.

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Er3+–Yb3+ doped vanadate nanocrystals: A highly sensitive thermographic phosphor and its optical nanoheater behavior

Cited by 194 publications

References 37 publications

Demonstration of Temperature Dependent Energy Migration in Dual-Mode YVO4: Ho3+/Yb3+ Nanocrystals for Low Temperature Thermometry

Demonstration of Temperature Dependent Energy Migration in Dual-Mode YVO4: Ho3+/Yb3+ Nanocrystals for Low Temperature Thermometry

Dual-Phase Glass Ceramic: Structure, Dual-Modal Luminescence, and Temperature Sensing Behaviors

Valley-to-peak intensity ratio thermometry based on the red upconversion emission of Er^3+

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