Ytterbium Doped Gadolinium Oxide (Gd2O3:Yb3+) Phosphor: Topology, Morphology, and Luminescence Behaviour

Tamrakar, Raunak Kumar; Bisen, D. P.; Robinson, C. S.; Sahu, Ishwar Prasad; Brahme, Nameeta

doi:10.1155/2014/396147

Cited by 30 publications

(23 citation statements)

References 20 publications

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“…The precursor materials were weighed in stoichiometric ratio and grounded by using mortar and pestle. The mixture were transferred into alumina crucible and placed in a muffle furnace followed by heating at 1200 C for 3 h (Tamrakar, Bisen, & Brahme, 2014a, 2014cTamrakar, Bisen, Robinson, Sahu & Brahme, 2014;Tamrakar, Bisen, Upadhyay & Brahme, 2014;.…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence behavior of ZrO2: Eu3+ with variable concentration of Eu3+ doped phosphor

Tamrakar

Bisen

Upadhyay³

2015

Journal of Radiation Research and Applied Sciences

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PhotoluminescenceScanning electron microscope CIE a b s t r a c tThe ZrO 2 phosphor doped with Eu 3þ was synthesized by solid state reaction method which is suitable for large scale production, and high temperature synthesis method.The prepared nanoparticles of ZrO 2 phosphor was characterized by X-ray diffraction technique (XRD) for Structural analysis and field emission gun scanning electron microscopy (FEGSEM)) for morphological details. The optical behavior of the prepared phosphor was determined by photoluminescence (PL) spectra recorded in room temperature. The PL excitation spectra was found at 311 nm range and the emission spectra in the range of 400e650 nm.

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Section: Introductionmentioning

confidence: 99%

Photoluminescence behavior of ZrO2: Eu3+ with variable concentration of Eu3+ doped phosphor

Tamrakar

Bisen

Upadhyay³

2015

Journal of Radiation Research and Applied Sciences

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“…Thermally stimulated luminescence glow curves were recorded at room temperature by using TLD reader I1009 supplied by Nucleonix Sys.Pvt.Ltd. Hyderabad (Tamrakar & Bisen 2013a, 2013b, Tamrakar, Bisen, Robinson, Sahu, & Brahme, 2014 …”

Section: Methodsmentioning

confidence: 99%

“…The study of relatively deep trapping defect-states in various phosphors, as well as TL dating of solid state materials, is closely related to the position of the trapping levels within the forbidden gap. Although there are various methods to obtain the number of glow peaks in the complex glow curves and their kinetic parameters that best describe the peaks (McKeever, 1985;, Tamrakar, Bisen, Robinson, et al, 2014.…”

Section: Thermoluminescence Studymentioning

confidence: 99%

Down conversion luminescence behavior of Er and Yb doped Y2O3 phosphor

Agrawal

Dubey

2014

Journal of Radiation Research and Applied Sciences

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Photoluminescence Thermoluminescence a b s t r a c t We have studied downconversion luminescence behaviour of Y 2 O 3 phosphor doped with Er 1 mol% and 1 mol% of Yb. The sample was prepared by modified solid state reaction method. Using inorganic material like (Y 2 O 3 ), Flux Calcium Fluoride (CaF 2 ) and Er 2 O 3 as well as Yb 2 O 3 with molar ratio 1 mol% of dopant. The prepared phosphor sample was characterized using Powder X-Ray Diffraction (PXRD), Field Emission Gun Scanning Electron Microscopy (FEGSEM), High Resolution Transmission Electron Microscopy (HRTEM), Photoluminescence (PL), Thermoluminescence (TL) and CIE techniques. The obtained sample shows an intense greenish-white emission (ranging from 350 to 600 nm, centered at 565 nm) under a wide range of UV light excitation (220e400 nm).

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“…Recently, many researchers have been devoted to the TL properties of different micro sized materials that show some outstanding characteristics for instance high sensitivity and saturation at very high dose levels Tamrakar et al, 2014"b";Tamrakar et al, 2014"c";. The Sao et al (2013) have synthesized the Ag + doped (Cd0.95Zn.05)S phosphors in air atmosphere with KCl as a flux, and studies the ML and TL properties with a fix amount of silver (Sao, 2014).…”

Section: Introductionmentioning

confidence: 99%

Effect of Silver Concentration on Thermoluminescence Studies of (Cd0.95Zn.05)S Phosphors with Trap Depth Parameters Synthesized by Solid State Reaction Method

Tamrakar¹,

Kowar²,

Uplop³

et al. 2014

JLA

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The present paper reports the synthesis and characterization of Ag+ doped (Cd0.95Zn.05)S phosphors. The effect of variable concentration of silver on thermoluminescence (TL) studies was investigated. The samples were prepared by solid state synthesis technique which is suitable for large scale production for phosphors. The starting materials used for sample preparation were CdS, ZnS, (Ag(NO3)3 and sodium chloride was used as a flux during synthesis. The prepared sample was characterized by X-ray diffraction technique (XRD). Sample shows hexagonal structure and the particle size calculated by Scherer's formula. The prepared phosphors were also examined by thermoluminescence technique. For recording TL glow curve every time 2mg phosphor was irradiated by 254nm UV source and fixed the heating rate at 8 0 C s -1 . Sample shows wellresolved peak at 102 0 C for different concentration of Ag + . In addition, the effect of Ag + concentration at fixed UV exposure time was studied. The effect of UV exposure time and dose versus intensity plot were studied. Sample shows linear response with dose and broaden peak with lower temperature shows the less stability and more fading in TL glow curve. Trapping parameters were calculated for every recorded glow curve. The heating rate effect on TL glow curve was also studied. The sample shows the shifting of TL glow curve towards to lower temperature side with increasing of heating rate. The kinetic parameters like trap depth, frequency factor were calculated by using the Peak shape method, which are discussed in details. The TL Glow curves were fitted in CGCD (computerized glow curve convolution deconvolution) technique & trapping parameters calculated.

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Ytterbium Doped Gadolinium Oxide (Gd₂O₃:Yb³⁺) Phosphor: Topology, Morphology, and Luminescence Behaviour

Cited by 30 publications

References 20 publications

Photoluminescence behavior of ZrO2: Eu3+ with variable concentration of Eu3+ doped phosphor

Photoluminescence behavior of ZrO2: Eu3+ with variable concentration of Eu3+ doped phosphor

Down conversion luminescence behavior of Er and Yb doped Y2O3 phosphor

Effect of Silver Concentration on Thermoluminescence Studies of (Cd0.95Zn.05)S Phosphors with Trap Depth Parameters Synthesized by Solid State Reaction Method

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