Photoluminescence, trap states and thermoluminescence decay process study of Ca2MgSi2O7: Eu2+, Dy3+ phosphor

Shrivastava, Ravi; Kaur, Jaspreet; Dubey, Vikas; Jaykumar, Beena

doi:10.1007/s12034-014-0027-0

Cited by 25 publications

(7 citation statements)

References 23 publications

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“…It is assumed that the charge carrier density may have increased with increasing UV exposure, and after 15 min of UV exposure, the trap level may have started to break down, resulting in a decrease TL intensity. The decrease in charge carrier density may be a reason for the low TL intensity at longer irradiation times (20 min) (3,21). Figure 9(b) shows the TL emission spectra of Ba 1.95 MgSi 2 O 7 :0.05 Eu 2+ phosphors, which shows the maximum TL emission at 500 nm, and confirmed the emission of Eu 2+ due to the transition from the 5d to the 4f state.…”

Section: Thermoluminescence Characteristicsmentioning

confidence: 79%

Photoluminescence and thermoluminescence properties of Eu²⁺ doped and Eu²⁺,Dy³⁺ co‐doped Ba₂MgSi₂O₇ phosphors

et al. 2016

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In this work, we report the preparation, characterization, comparison and luminescence mechanisms of Eu -doped and Eu ,Dy -co-doped Ba MgSi O (BMSO) phosphors. Prepared phosphors were synthesized via a high temperature solid-state reaction method. All prepared phosphors appeared white. The phase structure, particle size, and elemental analysis were analyzed using X-ray diffraction (XRD), transmission electron microscopy (TEM) and energy-dispersive X-ray (EDX) analysis. The luminescence properties of the phosphors were investigated by thermoluminescence (TL) and photoluminescence (PL). The PL excitation and emission spectra of Ba MgSi O :Eu showed the peak to be around 381 nm and 490 nm respectively. The PL excitation spectrum of Ba MgSi O :Eu Dy showed the peak to be around 341 nm and 388 nm, and the emission spectrum had a broad band around 488 nm. These emissions originated from the 4f 5d to 4f transition of Eu . TL analysis revealed that the maximum TL intensity was found at 5 mol% of Eu doping in Ba MgSi O phosphors after 15 min of ultraviolet (UV) light exposure. TL intensity was increased when Dy ions were co-doped in Ba MgSi O :Eu and maximum TL intensity was observed for 2 mol% of Dy . TL emission spectra of Ba MgSi O :0.05Eu and Ba MgSi O :0.05Eu ,0.02Dy phosphors were found at 500 nm. TL intensity increased with UV exposure time up to 15 min, then decreased for the higher UV radiation dose for both Eu doping and Eu,Dy co-doping. The trap depths were calculated to be 0.54 eV for Ba MgSi O :0.05Eu and 0.54 eV and 0.75 eV for Ba MgSi O :0.05Eu ,0.02Dy phosphors. It was observed that co-doping with small amounts of Dy enhanced the thermoluminescence properties of Ba MgSi O phosphor. Copyright © 2016 John Wiley & Sons, Ltd. [Correction added on 5 April 2016, after first online publication: The following parts of the abstract have been edited for consistency. '4f65d1' has been corrected to '4f 5d ', '4f7' has been corrected to '4f ', 'Ba1.95' has been corrected to 'Ba ' and 'Ba1.93' has been corrected to 'Ba ' respectively.].

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Section: Thermoluminescence Characteristicsmentioning

confidence: 79%

Photoluminescence and thermoluminescence properties of Eu²⁺ doped and Eu²⁺,Dy³⁺ co‐doped Ba₂MgSi₂O₇ phosphors

et al. 2016

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“…As a result, the trapping parameters of a thermoluminescent material are the foundation for an accurate dosimetry investigation. 54–61…”

Section: Resultsmentioning

confidence: 99%

Optimizing the luminescence efficiency of an europium (Eu³⁺) doped SrY₂O₄ phosphor for flexible display and lighting applications

Verma¹,

Michalska-Domańska

Ram³

et al. 2023

RSC Adv.

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“…It shows the well resolved peak of the TL glow curve and UV dose response linearly presented the dosimetric behaviour. The produced phosphor may be useful for UV‐induced TLDs [21–28].…”

Section: Resultsmentioning

confidence: 99%

Intense green light emission and thermoluminescence glow curve analysis of Tb³⁺‐activated CaY₂O₄ phosphor

Ram¹,

Verma²,

Kaur³

et al. 2023

Luminescence

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Here, the synthesis and luminescence analysis of the Tb3+‐activated phosphor were reported. The CaY2O4 phosphors were synthesized using a modified solid‐state reaction method with a variable doping concentration of Tb3+ ion (0.1–2.5 mol%). As synthesized, the phosphor was characterized using Fourier transform infrared spectroscopy (FTIR) and X‐ray diffraction analysis techniques for the optimized concentration of doping ions. The prepared phosphor showed a cubic structure, and FTIR analysis confirmed functional group analysis. It was discovered that the intensity of 1.5 mol% was higher than at other concentrations after the photoluminescence (PL) excitation and emission spectra were recorded for different concentrations of doping ions. The excitation was monitored at 542 nm, and the emission was monitored at 237 nm. At 237 nm excitation, the emission peaks were found at 620 nm (5D4→7F3), 582 nm (5D4→7F4), 542 nm (5D4→7F5), and 484 nm (5D4→7F6). The 1931 CIE (x, y) chromaticity coordinates showed the distribution of the spectral region calculated from the PL emission spectra. The values of (x = 0.34 and y = 0.60) were very close to dark green emission. Therefore, the produced phosphor would be very useful for light‐emitting diode (green component) applications. Thermoluminescence glow curve analysis for various concentrations of doping ions and various ultraviolet (UV) exposure times was carried out, and a single broad peak was found at 252°C. The computerized glow curve deconvolution method was used to obtain the related kinetic parameters. The prepared phosphor exhibited an excellent response to UV dose and could be useful for UV ray dosimetry.

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Photoluminescence, trap states and thermoluminescence decay process study of Ca2MgSi2O7: Eu2+, Dy3+ phosphor

Cited by 25 publications

References 23 publications

Photoluminescence and thermoluminescence properties of Eu²⁺ doped and Eu²⁺,Dy³⁺ co‐doped Ba₂MgSi₂O₇ phosphors

Photoluminescence and thermoluminescence properties of Eu²⁺ doped and Eu²⁺,Dy³⁺ co‐doped Ba₂MgSi₂O₇ phosphors

Optimizing the luminescence efficiency of an europium (Eu³⁺) doped SrY₂O₄ phosphor for flexible display and lighting applications

Intense green light emission and thermoluminescence glow curve analysis of Tb³⁺‐activated CaY₂O₄ phosphor

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Photoluminescence, trap states and thermoluminescence decay process study of Ca2MgSi2O7: Eu2+, Dy3+ phosphor

Cited by 25 publications

References 23 publications

Photoluminescence and thermoluminescence properties of Eu2+ doped and Eu2+,Dy3+ co‐doped Ba2MgSi2O7 phosphors

Photoluminescence and thermoluminescence properties of Eu2+ doped and Eu2+,Dy3+ co‐doped Ba2MgSi2O7 phosphors

Optimizing the luminescence efficiency of an europium (Eu3+) doped SrY2O4 phosphor for flexible display and lighting applications

Intense green light emission and thermoluminescence glow curve analysis of Tb3+‐activated CaY2O4 phosphor

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Photoluminescence and thermoluminescence properties of Eu²⁺ doped and Eu²⁺,Dy³⁺ co‐doped Ba₂MgSi₂O₇ phosphors

Photoluminescence and thermoluminescence properties of Eu²⁺ doped and Eu²⁺,Dy³⁺ co‐doped Ba₂MgSi₂O₇ phosphors

Optimizing the luminescence efficiency of an europium (Eu³⁺) doped SrY₂O₄ phosphor for flexible display and lighting applications

Intense green light emission and thermoluminescence glow curve analysis of Tb³⁺‐activated CaY₂O₄ phosphor