Photo- and thermoluminescence properties of single-phase white light-emitting Y2−xSiO5:xDy3+ nanophosphor: a concentration-dependent structural and optical study

Dhanalakshmi, K.; Krishna, R. Hari; Reddy, A. Jagannatha; Chandraprabha, M.N.; Monika, D.L.; Parashuram, L.

doi:10.1007/s00339-019-2814-3

Cited by 7 publications

(2 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…9 Dy 0 . 1 SiO 5 ) was synthesized by a modified Pechini method (the optimal Dy 3+ concentration was taken according to reference [31]). The desired material was obtained by dissolving stoichiometric amounts of solid metal nitrates (M) in the solution of CA in EG (M: CA: EG = 1:5:25 molar ratio); please see Table 1 for exact amounts.…”

Section: Methodsmentioning

confidence: 99%

Thirty-Fold Increase in Relative Sensitivity of Dy3+ Luminescent Boltzmann Thermometers Using Multiparameter and Multilevel Cascade Temperature Readings

et al. 2023

View full text Add to dashboard Cite

The sensitivity of luminescent Boltzmann thermometers is restricted by the energy difference between the thermally coupled excitement levels of trivalent lanthanides, and their values further decrease with increases in temperature, rendering their use at high temperatures difficult. Here, we demonstrate how to overcome this sensitivity limitation by employing multiparameter and multilevel cascade temperature readings. For this purpose, we synthesized Dy3+:Y2SiO5, a phosphor whose emission is known to begin quenching at very high temperatures. Its photoluminescence-emission features, later used for thermometry, consisted of two blue emission bands centered around 486 nm and 458 nm, and two bands centered around 430 nm and 398 nm, which were only visible at elevated temperatures. Next, we performed thermometry using the standard luminescence-intensity ratio (LIR) method, which employs the 4F9/2 and 4I15/2 Dy3+ levels’ emissions and the multilevel cascade method, which additionally uses the 4G11/2 level and overlapping intensities of 4I13/2, 4M21/2, 4K17/2, and 4F7/2 levels to create two LIRs with a larger energy difference than the standard LIR. This approach yielded a sensitivity that was 3.14 times greater than the standard method. Finally, we simultaneously exploited all the LIRs in the multiparameter temperature readings and found a relative sensitivity that was 30 times greater than that of the standard approach.

show abstract

Section: Methodsmentioning

confidence: 99%

Thirty-Fold Increase in Relative Sensitivity of Dy3+ Luminescent Boltzmann Thermometers Using Multiparameter and Multilevel Cascade Temperature Readings

et al. 2023

View full text Add to dashboard Cite

show abstract

“…XRD analysis of electrocatalyst was used for crystal phase identification. The X-ray diffraction patterns of pure Zirconia, Mn 3 + /4 + : ZrO 2 nanoganitrus catalysts were as shown in Besides, the average crystalline size was determined by Scherer's equation [31] using the prominent diffraction peak of (111) plane as follows, D = (kλ/β cos θ)Where D is the average size of the crystallite, k is Scherrer's constant, λ is X-ray wavelength, β is FWHM (Full width at half maximum) of the diffraction peak and θ is diffraction angle. The average crystallite size was calculated to be 36 nm.…”

Section: Materials Characterizationmentioning

confidence: 99%

Elaeocarpus Ganitrus Structured Mesoporous Hybrid Mn^3+/4+ loaded Zirconia Self Assembly as a Versatile Amperometric Probe for the Electrochemical Detection of Nitrite

Gangadharappa

Raghu²,

Kumar

et al. 2021

ChemistrySelect

View full text Add to dashboard Cite

Selective and highly sensitive detection of nitrite is always a challenge for electrochemist for the administration of nitrite in water and food samples. In this regard nanostructured materials are crown choice. In the present investigation, we have prepared uniformly ordered hybrid Mn 3 + /4 + : ZrO 2 nanoganitrus via hydrothermal method, characterized by XRD, BET, SEM, TEM and XPS to understand the structural and morphological features of the material and used for the electrocatalytic determination of nitrite. The preparation process resulted in the formation of nanoganitrus heterostructures with honeycomb arrangement. High surface area, ganitrus structure and hybrid Mn 3 + /4 + in the material was correlated to its robust electrochemical performance. Thus, prepared sensor showed highly selective and sensitive determination of nitrite with a good linear range of 250 μM to 10,000 μM with correlation coefficient of 0.998 and a sensitivity of 38.8 μAmM À 1 cm À 2. The limit of Detection of nitrite sensing system was 93 μM at a signal to noise ratio of 3. Also, the sensor showed prominent reproducibility, good stability, anti-interference performance and also the prepared sensor was successfully used for the detection of nitrite in real samples.

show abstract

Investigation of luminescence spectroscopic characteristics in Eu3+-doped Zn2SiO4 by Judd–Ofelt parameters

Prathibha

Krishna

Nagesh

et al. 2021

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Photo- and thermoluminescence properties of single-phase white light-emitting Y2−xSiO5:xDy3+ nanophosphor: a concentration-dependent structural and optical study

Cited by 7 publications

References 47 publications

Thirty-Fold Increase in Relative Sensitivity of Dy3+ Luminescent Boltzmann Thermometers Using Multiparameter and Multilevel Cascade Temperature Readings

Thirty-Fold Increase in Relative Sensitivity of Dy3+ Luminescent Boltzmann Thermometers Using Multiparameter and Multilevel Cascade Temperature Readings

Elaeocarpus Ganitrus Structured Mesoporous Hybrid Mn^3+/4+ loaded Zirconia Self Assembly as a Versatile Amperometric Probe for the Electrochemical Detection of Nitrite

Investigation of luminescence spectroscopic characteristics in Eu3+-doped Zn2SiO4 by Judd–Ofelt parameters

Contact Info

Product

Resources

About

Photo- and thermoluminescence properties of single-phase white light-emitting Y2−xSiO5:xDy3+ nanophosphor: a concentration-dependent structural and optical study

Cited by 7 publications

References 47 publications

Thirty-Fold Increase in Relative Sensitivity of Dy3+ Luminescent Boltzmann Thermometers Using Multiparameter and Multilevel Cascade Temperature Readings

Thirty-Fold Increase in Relative Sensitivity of Dy3+ Luminescent Boltzmann Thermometers Using Multiparameter and Multilevel Cascade Temperature Readings

Elaeocarpus Ganitrus Structured Mesoporous Hybrid Mn3+/4+ loaded Zirconia Self Assembly as a Versatile Amperometric Probe for the Electrochemical Detection of Nitrite

Investigation of luminescence spectroscopic characteristics in Eu3+-doped Zn2SiO4 by Judd–Ofelt parameters

Contact Info

Product

Resources

About

Elaeocarpus Ganitrus Structured Mesoporous Hybrid Mn^3+/4+ loaded Zirconia Self Assembly as a Versatile Amperometric Probe for the Electrochemical Detection of Nitrite