Synthesis and luminescence properties of RE3+ (re = eu3+, Dy3+) activated CaSr2(PO4)2 phosphors for lighting and dosimetric applications

Parauha, Yatish R.; Chopra, Vibha; Dhoble, S.J.

doi:10.1016/j.materresbull.2020.110971

Cited by 46 publications

(13 citation statements)

References 59 publications

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“…The different orders of kinetics correspond to the various mechanisms involved in the TL process. A detailed discussion of the Chen's peak shape method has been already given by Parauha et al and various other researchers [29][30][31][33][34][35]. They are also reported formulas for calculated trapping parameters under different orders of kinetics.…”

Section: Chen's Peak Shape Methodsmentioning

confidence: 97%

Investigations of thermoluminescence characteristics of SrAlBO₄:Eu³⁺ phosphors irradiated with gamma rays and carbon ion beam

Joseph,

Parauha,

Dhoble

2023

Luminescence

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A series of SrAlBO4: Eu phosphors doped with different concentrations of Eu (0.1 0.3, 0.5, 0.7, 1.0 mol%) have been synthesized via solid state diffusion method and their thermoluminescence properties were analyzed for gamma and carbon ion irradiation. The phase purity, morphological properties, vibrational features and thermal stability of the prepared sample were analyzed by X‐Ray diffraction (XRD) and scanning electron microscope (SEM), Fourier transform infrared (FT‐IR) and Thermogravimetric/Differential Thermal Analyzer (TG/DTA) techniques, respectively. The TL properties of the proposed materials shows broad dosimetric bands, peaking at 202 oC for 0.12 kGy gamma irradiation. The highest TL intensity has obtained for 0.7 mol% concentration of Eu ions under Gamma irradiation. Furthermore, the glow curve of the proposed materials shows a broad emission band, centered at 148 °C under carbon ion beam irradiation and exhibits the highest emission intensity for 0.1 mol% Eu concentration. In addition, the dosimetric trapping parameters of the prepared samples such as symmetry factor, order of kinetics, activation energy, frequency factor have been analyzed using various methods such as chen’s peak shape method, initial growth method, Ilich method. The obtained results of the samples show the potential for dosimetric application.

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Section: Chen's Peak Shape Methodsmentioning

confidence: 97%

Investigations of thermoluminescence characteristics of SrAlBO₄:Eu³⁺ phosphors irradiated with gamma rays and carbon ion beam

Joseph,

Parauha,

Dhoble

2023

Luminescence

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“…However, on further increasing the doping impurity concentration, the defect centers overlap with each other because the distance between the dopant ions decreases, which perturbs the energy levels of these dopant ions. As a result, the TL glow curve does not contribute toward an increase in intensity [25][26][27][28][29]. Dy (5 mol%) is the optimum dopant concentration for this phosphor.…”

Section: Effect Of Dopant Concentrationmentioning

confidence: 99%

Thermoluminescence dosimeter (TLD) studies of Ca₁₀K(PO₄)₇:Dy phosphor for applications in radiation dosimetry

Mehra

Chopra

2023

Luminescence

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This paper reports the thermoluminescence (TL) aspects of Ca10K(PO4)7:Dy phosphor synthesized by the wet chemical method for the first time. The XRD results confirm the formation of the desired crystalline phase. Surface morphological studies reveal the formation of polyhedrons and agglomerations having an average diameter of 200 nm while EDS data shows the presence and composition of the elements in appropriate amounts. The effect of Dy doping concentration has been studied on the thermoluminescence properties with exposure to gamma radiations from the Co‐60 source. Best TL has been observed for 5 mol% Dy doping concentration. The glow curve is simple and consists of a single peak at 130oC. The effect of the heating rate has been studied on the TL glow curve and the heating rate of 5oC/s shows the best TL response. The various TL properties such as annealing conditions, dose‐response, TL linearity, fading, reusability, etc. of the prepared phosphor have been studied to check its suitability as a good TL dosimeter. Thermoluminescence characterization of the phosphor reports that the TL response is linear from 5Gy‐2000 Gy. The results show that this phosphor can be a good TL dosimeter for the dosimetry of gamma radiations from Co‐60.

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“…The obtained values of θ close to 6, 8 or 10 were attributed to dipole-dipole (d-d), dipole-quadrupole (d-p), and quadrupole-quadrupole (q-q) interactions, respectively. [34] F I G U R E 8 Concentration quenching curve of Ca The graphical representation of calculated log(x) and log I X À Á is shown in Figure 9. This shows the linear relationship and slope of the straight line, which was obtained to be À1.8247 that is equal to À θ 3 À Á .…”

Section: Photoluminescence Characteristicsmentioning

confidence: 99%

Synthesis and novel emission properties of Bi³⁺‐doped Ca₂BO₃Cl phosphor for plant cultivation

et al. 2022

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In the present work, a series of Bi 3+ -activated Ca 2 BO 3 Cl phosphors was synthesized using the conventional high-temperature solid-state reaction method. The crystal structure of the prepared sample was determined to be monoclinic with space group P21/c. Scanning electron microscopy (SEM) analysis demonstrated the surface morphology with aggregated particles and sizes in the nano range.The presence of vibrational features and their luminescence characteristics were studied using Fourier transform infrared spectroscopy and photoluminescence (PL) techniques, respectively. At the 486 nm excitation wavelength, the PL spectrum revealed a sharp emission centred at 732 nm that was attributed to the 3 P 1 ! 1 S 0 transition of Bi 3+ . The emission spectra exhibited the highest emission intensity at 0.5 mol% Bi 3+ ion concentration, beyond this the emission intensity decreased due to the concentration quenching phenomenon attributed to multipolar interaction. The Commission Internationale de l'éclairage coordinates located at (0.7347, 0.2653) confirmed emission in the deep-red region with a colour purity of 99.98%. The obtained outcomes suggested that the reported material may be a promising candidate as a red-emitting phosphor for w-LEDs and plant growth applications.

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Synthesis and luminescence properties of RE3+ (re = eu3+, Dy3+) activated CaSr2(PO4)2 phosphors for lighting and dosimetric applications

Cited by 46 publications

References 59 publications

Investigations of thermoluminescence characteristics of SrAlBO₄:Eu³⁺ phosphors irradiated with gamma rays and carbon ion beam

Investigations of thermoluminescence characteristics of SrAlBO₄:Eu³⁺ phosphors irradiated with gamma rays and carbon ion beam

Thermoluminescence dosimeter (TLD) studies of Ca₁₀K(PO₄)₇:Dy phosphor for applications in radiation dosimetry

Synthesis and novel emission properties of Bi³⁺‐doped Ca₂BO₃Cl phosphor for plant cultivation

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Synthesis and luminescence properties of RE3+ (re = eu3+, Dy3+) activated CaSr2(PO4)2 phosphors for lighting and dosimetric applications

Cited by 46 publications

References 59 publications

Investigations of thermoluminescence characteristics of SrAlBO4:Eu3+ phosphors irradiated with gamma rays and carbon ion beam

Investigations of thermoluminescence characteristics of SrAlBO4:Eu3+ phosphors irradiated with gamma rays and carbon ion beam

Thermoluminescence dosimeter (TLD) studies of Ca10K(PO4)7:Dy phosphor for applications in radiation dosimetry

Synthesis and novel emission properties of Bi3+‐doped Ca2BO3Cl phosphor for plant cultivation

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Investigations of thermoluminescence characteristics of SrAlBO₄:Eu³⁺ phosphors irradiated with gamma rays and carbon ion beam

Investigations of thermoluminescence characteristics of SrAlBO₄:Eu³⁺ phosphors irradiated with gamma rays and carbon ion beam

Thermoluminescence dosimeter (TLD) studies of Ca₁₀K(PO₄)₇:Dy phosphor for applications in radiation dosimetry

Synthesis and novel emission properties of Bi³⁺‐doped Ca₂BO₃Cl phosphor for plant cultivation