Luminescence and evaluation of trapping parameters in NaMgSO4Cl: X (X=Cu or Ce) phosphor

Gedam, S.C.; Dhoble, S.J.

doi:10.1016/j.jlumin.2012.04.051

Cited by 8 publications

(3 citation statements)

References 44 publications

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“…NaMgSO 4 Cl:Ce;Ce,Dy phosphor is prepared by a wet chemical method . MgSO 4 and NaCl of analar grade were taken in a stoichiometric ratio and dissolved separately in double distilled deionized water, resulting in a solution of NaMgSO 4 Cl.…”

Section: Methodsmentioning

confidence: 99%

Study of luminescence and effect of Dy³⁺ on NaMgSO₄Cl:Ce chlorosulphate phosphor

Choubey¹,

Gedam²,

Dhoble

2014

Luminescence

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Chlorosulphate NaMgSO4 Cl phosphor doped with Ce(3+) and co-doped by Dy(3+) prepared by the wet chemical method was studied for its photoluminescence and thermoluminescence (TL) characteristics. The emission spectrum of Ce(3+) shows dominant peaks at 346 nm (excitation 270 nm) due to 5d → 4f transition. Efficient energy transfer occurs from Ce(3+) → Dy(3+) ions. Dy(3+) emission at 485 nm and 576 nm is due to (4) F9/2 → (6) H15/2 and (4) F9/2 → (6) H13/2 transitions of Dy(3+) ion respectively. The TL glow curves of NaMgSO4 Cl:Ce and Ce,Dy have been recorded for various concentrations at a heating rate of 2 °C/s irradiated by γ-rays at a dose rate of 0.995 kGy/h for 1 Gy, which peaks at about 241 °C and 247-312 °C respectively. Further, in changing the concentration level, the general structure of the intensity is found to increase. The main property of this phosphor is its sensitivity even for low concentrations of rare earth ions and low γ-ray dose. There is still scope for higher doses of γ-radiation. The phosphor presented may be used as a lamp phosphor as well as for TL studies.

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Section: Methodsmentioning

confidence: 99%

Study of luminescence and effect of Dy³⁺ on NaMgSO₄Cl:Ce chlorosulphate phosphor

Choubey¹,

Gedam²,

Dhoble

2014

Luminescence

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“…The trapping parameter plays an important role in thermoluminescence. The various techniques have been developed for determination of trapping parameter as activation energy E, order of kinetics b, frequency factor s [37]. Analysis of TL glow curve has become more important for the Defect and Diffusion Forum Vol.…”

Section: Analysis Of the Tl Glow Curve And Calculation Of The Trappin...mentioning

confidence: 99%

Photoluminescence and Thermoluminescence Properties of Eu2+ and Ce3+ Activated BaAlSi5O2N7 Phosphors

Fartode¹,

Singh

Dhoble

2015

DDF

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Ce3+ and Eu2+ activated BaAlSi5O2N7 phosphors have been prepared by the modified three step solid state diffusion method. Prepared phosphors are characterized by XRD, SEM, photoluminescence and thermoluminescence techniques. Upon excitation at 234nm, Ce3+ activated BaAlSi5O2N7 phosphor shows strong emission at 360nm. Upon excitation at 348nm, Eu2+ activated BaAlSi5O2N7 phosphor shows strong emission at 469nm in the blue region of the optical spectrum. After quenching at higher temperature and upon excitation at 363nm, BaAlSi5O2N7:Eu2+ phosphor shows broad band at 516nm in the green region of the optical spectrum. The trap parameters are studied using glow curve deconvolution. It was found that the obtained samples may be suitable for near UV excited white light emitting diodes.

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“…46 -b). O possível deslocamento do espectro de emissão com o aumento da concentração sugere indícios da formação de agregados na solução como também da reabsorção da emissão, processo característico de radiation trapping (GEDAM;DHOBLE, 2012). Contudo, neste trabalho desconsideramos tal efeito devido à utilização de uma única concentração com valor correspondente a 1,24x10 -3 g/mL para amostras tanto em DMSO ou CLF, bem como o uso de cubeta com caminho óptico relativamente pequeno.…”

Section: Fotoluminescência (Pl)unclassified

Evidências da transferência de energia fluorescente ressonante no sistema ponto quântico - corante através das medidas de microluminêscencia de varredura espacial

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Luminescence and evaluation of trapping parameters in NaMgSO4Cl: X (X=Cu or Ce) phosphor

Cited by 8 publications

References 44 publications

Study of luminescence and effect of Dy³⁺ on NaMgSO₄Cl:Ce chlorosulphate phosphor

Study of luminescence and effect of Dy³⁺ on NaMgSO₄Cl:Ce chlorosulphate phosphor

Photoluminescence and Thermoluminescence Properties of Eu<sup>2+</sup> and Ce<sup>3+ </sup>Activated BaAlSi<sub>5</sub>O<sub>2</sub>N<sub>7</sub> Phosphors

Evidências da transferência de energia fluorescente ressonante no sistema ponto quântico - corante através das medidas de microluminêscencia de varredura espacial

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Luminescence and evaluation of trapping parameters in NaMgSO4Cl: X (X=Cu or Ce) phosphor

Cited by 8 publications

References 44 publications

Study of luminescence and effect of Dy3+ on NaMgSO4Cl:Ce chlorosulphate phosphor

Study of luminescence and effect of Dy3+ on NaMgSO4Cl:Ce chlorosulphate phosphor

Photoluminescence and Thermoluminescence Properties of Eu<sup>2+</sup> and Ce<sup>3+ </sup>Activated BaAlSi<sub>5</sub>O<sub>2</sub>N<sub>7</sub> Phosphors

Evidências da transferência de energia fluorescente ressonante no sistema ponto quântico - corante através das medidas de microluminêscencia de varredura espacial

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Study of luminescence and effect of Dy³⁺ on NaMgSO₄Cl:Ce chlorosulphate phosphor

Study of luminescence and effect of Dy³⁺ on NaMgSO₄Cl:Ce chlorosulphate phosphor