Synthesis, characterization and luminescence behavior of ZrO2:Eu3+, Dy3+ with variable concentration of Eu and Dy doped Phosphor

Kaur, Jaspreet; Parganiha, Yogita; Dubey, Vikas; Singh, Deepti; Chandrakar, Deepika

doi:10.1016/j.spmi.2014.05.009

Cited by 59 publications

(15 citation statements)

References 39 publications

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“…Urea was oxidized by nitrate ions and served as a fuel for propellant reaction. The powders obtained were then further calcined from 600°C for 3 h to increase the luminescence efficiency [19,20].…”

Section: Methodsmentioning

confidence: 99%

Mechanoluminescence Study of Europium Doped CaZrO3 Phosphor

Tiwari¹,

Dubey

Kuraria³

2016

J Fluoresc

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Behaviour displayed by mechanoluminescence (ML) in CaZrO3:Eu(3+) doped phosphors with variable concentration of europium ions are described. When the ML is excited impulsively by the impact of a load on the phosphors the ML intensity increases with time, attains a maximum value and then it decreases. In the ML intensity versus time curve, the peak increases and shifts towards shorter time values with increasing impact velocities. Sample was synthesized by combustion synthesis method with variable concentration of Eu(3+) ions (0.1, 0.2, 0.5, 1, 1.5 mol%) and characterized by X-ray diffraction technique. The total ML intensity IT is defined as the area below the ML intensity versus time curve. Initially IT increases with impact velocity V0 of the load and then it attains a saturation value for higher values of impact velocities which follow the relation IT = IT (0) exp.(-Vc/V0) where IT (0) and Vc are constants. Total ML intensity increases linearly with the mass of the phosphors for higher impact velocities. The ML intensity Im, corresponding to the peak of ML intensity versus time curve increases linearly with the impact velocities. The time tm, is found to be linearly related to 1000/V0. The mechanoluminescence induced by impulsive excitation in europium doped CaZrO3 phosphors plays a significance role in the understanding of biological sensors and display device application.

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Section: Methodsmentioning

confidence: 99%

Mechanoluminescence Study of Europium Doped CaZrO3 Phosphor

Tiwari¹,

Dubey

Kuraria³

2016

J Fluoresc

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“…3+ is a well known lanthanide ion used for a wide variety of optical applications [22][23][24][25][26][27][28][29][30][34][35][36][37][38][39][40][41][42], with a common application being two-color thermometry (TCT) [22][23][24][25][26][27][28][29][30]34]. TCT using Dy relies on two closely spaced Dy energy levels ( 4 I 15/2 and 4 F 9/2 ) to act as a probe of temperature.…”

Section: Dymentioning

confidence: 99%

Two-color thermosensors based on [Y $$_{1-x}$$ 1 - x Dy $$_x$$ x (acetylacetonate) $$_3$$ 3 (1,10-phenanthroline)] molecular crystals

2017

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We develop a two-color thermometry (TCT) phosphor based on [Y1−xDyx(acetylacetonate)3(1,10-phenanthroline)] ([Y1−xDyx(acac)3(phen)]) molecular crystals for use in heterogeneous materials. We characterize the optical properties of [Y1−xDyx(acac)3(phen)] crystals at different temperatures and Dy concentrations and find that the emission is strongly quenched by increasing temperature and concentration. We also observe a broad background emission (due to the ligands) and find that [Y1−xDyx(acac)3(phen)] photodegrades under 355 nm illumination with the photodegradation resulting in decreased luminescence intensity. However, while decreasing the overall emission intensity, photodegradation is not found to influence the integrated intensity ratio of the 4 I 15/2 → 6 H 15/2 and 4 F 9/2 → 6 H 15/2 transitions. This ratio allows us to compute the temperature of the complex Based on the temperature dependence of these ratios we calculate that [Y1−xDyx(acac)3(phen)] has a maximum sensitivity of 1.5 % K −1 and our TCT system has a minimum temperature resolution of 1.8 K. Finally, we demonstrate the use of [Y1−xDyx(acac)3(phen)] as a TCT phosphor by determining a dynamic temperature profile using the emission from [Y1−xDyx(acac)3(phen)].

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“…To estimate the order of kinetics, the shape factor was calculated by the peak shape method [8,15,16]. For Y 2 SiO 5 doped with 0.1 mol% Ce 3?…”

Section: Tl Studiesmentioning

confidence: 99%

“…The frequency factor (s) represents the product of the number of times an electron hits the wall and the wall reflection coefficient, treating the trap as a potential well. Thus, a reliable dosimetry study of thermoluminescent material is based on its trapping parameters [8]. Y 2 SiO 5 is a well known luminescent material.…”

Section: Introductionmentioning

confidence: 99%

UV ray-induced thermoluminescence study of Y2SiO5:Ce3+ phosphor

Parganiha¹,

Kaur²,

Dubey

et al. 2015

Res Chem Intermed

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This paper reports thermoluminescence (TL) properties of Ce 3? doped yttrium silicate phosphor. The phosphor is synthesized by a solid state reaction method which is suitable for large scale production. Starting materials used for sample preparation were Y 2 O 3 , SiO 2 , CeO 2 and a fixed concentration of boric acid used as a flux. The prepared phosphors for different concentrations of Ce 3? were examined by observing their TL glow curves for UV irradiation (254-nm source). The samples show a well resolved broad peak covering a temperature range of 50-375°C. The kinetic parameters such as activation energy, order of kinetics and frequency factor were calculated by the peak shape method. Most of the peaks show general order kinetics. The effect of UV exposure on TL was also examined and a linear response to dose was shown, indicating the sample may be useful for a TL dosimeter. The kinetic parameters were calculated using a computerized glow curve de-convolution (CGCD) technique.

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Synthesis, characterization and luminescence behavior of ZrO2:Eu3+, Dy3+ with variable concentration of Eu and Dy doped Phosphor

Cited by 59 publications

References 39 publications

Mechanoluminescence Study of Europium Doped CaZrO3 Phosphor

Mechanoluminescence Study of Europium Doped CaZrO3 Phosphor

Two-color thermosensors based on [Y $$_{1-x}$$ 1 - x Dy $$_x$$ x (acetylacetonate) $$_3$$ 3 (1,10-phenanthroline)] molecular crystals

UV ray-induced thermoluminescence study of Y2SiO5:Ce3+ phosphor

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