Sm3+ induced-SrWO4 phosphor: analysis of photoluminescence and photocatalytic properties with electron density distribution studies

Sivaganesh, D.; Saravanakumar, S.; Sivakumar, V.; Sasikumar, S.; Gopal, J. Nandha; Kalpana, S.; Rajajeyaganthan, R.

doi:10.1007/s10854-020-03421-8

Cited by 28 publications

(9 citation statements)

References 45 publications

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“…Figure 1(a) was the well-matched x-ray diffraction spectra of Sr 1−x Eu x WO 4 (x=0.00, 0.01, 0.02, 0.03, 0.04 and 0.05) with standard SrWO 4 systems [7]. Figure 1(b) showed the x-ray diffraction peak of (112) plane.…”

Section: Structural Analysismentioning

confidence: 91%

“…Among them, metal tungstates AWO 4 : (A=Zn, Ba, Sr, Mg, Ca, etc) have been utilized broadly in the field of science, biology, engineering, and technological applications due to their excellent physicochemical properties [6]. In particular, scheelite-type strontium tungstates (SrWO 4 ) have gained interest in a x-ray intensifying screens, lasers, fluorescent lighting, microwave devices, optical fibers, solar cells and scintillators, because of their specific electrical, magnetic, thermal and optical properties [7]. In the SrWO 4 material, the system contains [SrO 8 ] and [WO 4 ] groups.…”

Section: Introductionmentioning

confidence: 99%

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Red emitting Eu³⁺ induced SrWO₄ materials: synthesis, structural, morphological and photoluminescence analysis

et al. 2021

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Rare-earth doped phosphors have occupied significant percentage in the field of luminescence applications. In order to get the optimized intensity of PL spectra, the dopant selection, dopant concentration and preparation technique plays a major role. In this work, SrWO 4 and Eu 3+ doped SrWO 4 were successfully synthesized via fuel assisted solid state reaction technique at a temperature of 900 °C. The effect of Eu concentration on SrWO 4 was analyzed by X-ray diffraction, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and PL spectroscopy. All the diffraction peaks of prepared SrWO 4 and Sr 1−x Eu x WO 4 (x=0.01, 0.02, 0.03, 0.04 and 0.05) were well-matched with the standard tetragonal phase of SrWO 4 . In the PL study, SrWO 4 :Eu 3+ shows the characteristics emission peaks at 5 D 0 → 7 F J (J=1, 2, 3, 4) transitions for Eu 3+ . 5 D 0 → 7 F 2 (615 nm) is predominant at 394 nm excitation wavelength. The PL emission intensity at 615 nm gradually increases upto 4% of Eu 3+ and then decreases. Using XPS, the chemical state analysis was carried out in Sr 1−x Eu x WO 4 (x=0.04) and Eu dopant is in 3+oxidation state. The electron density distribution analysis in the unit cell was carried using the maximum entropy method (MEM) and their charge derived properties were correlated with the PL analysis. Based on the different characterization analysis, Eu 3+ doped SrWO 4 act as an efficient red-emitting phosphor for Near UV (394 nm excitation), blue LED (450 nm excitation) based white LED and FED applications.

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Section: Structural Analysismentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Red emitting Eu³⁺ induced SrWO₄ materials: synthesis, structural, morphological and photoluminescence analysis

et al. 2021

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“…Structure factor values were used to analyse the charge derived properties of the NBT-xBSN ceramics. Previous studies reported for charge derived properties in ceramics using MEM technique [31,32]. Figure 3 (a)-(c) show the three-dimensional charge density distributions with an iso-surface level of 3 e Å −3 .…”

Section: Electronic Charge Density Studiesmentioning

confidence: 94%

Effect of BaSnO₃ on structural and electrical properties of lead free Na_0.5Bi_0.5TiO₃ ceramic solid solution

Sasikumar¹,

Fan²,

Wang³

et al. 2021

Phys. Scr.

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A series of novel lead-free (1-x)(Na 0.5 Bi 0.5 )TiO 3 -xBaSnO 3 , (x=0.00, 0.05, 0.10) ceramics were fabricated by solid-state air sintering route and their dielectric and microstructural properties were studied. Various experimental methods to characterize the fabricated ceramics such as PXRD, Raman spectra, SEM-EDS, UV-visible and dielectric studies. All the ceramics were crystallized by rhombohedral symmetry using PXRD and Rietveld profile refinement technique. The experimental atomic charge density distribution studies were performed and the bonding characteristics were analyzed. With increase of BSN content, the average grain size decreased and was characterized by scanning electron microscopy (SEM) technique. Energy dispersive x-ray (EDS) spectra indicate the presence elements and the diffusion of BSN into the rhombohedral phase of NBT matrix. The optical bandgap was determined by UV-Visible spectra and the values are found to be 3.05, 3.10 and 3.12 eV. The temperature dependence of dielectric constant (ε) provides evidence for dielectric anomalous behaviour in the higher doping of BSN concentration.

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“…Many other groups have used the maximum-entropy method (MEMS) in analyzing the placement of the electron density distribution along paths between atoms. − MEM utilizes the electron density information from diffraction data by maximizing the entropy information where it can be used to analyze polymeric systems. − In one case, the electron density was distributed closer to the atoms versus the center of the bond. This suggested more ionic behavior and reduced the bond length .…”

Section: Introductionmentioning

confidence: 99%

“…The locality of the electron density along the bond lengths, and the information it describes, suggest an influence on factors such as fluorescence efficiency and photocatalytic activity. Both, fluorescence efficiency and photocatalytic activity, relate to the ability of compounds to interact with light and in later stages further degrade due to this perturbation and interaction with light. , Although this is a powerful methodology, the analysis is based on electron density distribution between atoms of small molecules where long-range differences in electron density distribution are not able to be accounted for. By using computational methods, it is possible to account for such long-range distributions.…”

Section: Introductionmentioning

confidence: 99%

Relationships between the Photodegradation Reaction Rate and Structural Properties of Polymer Systems

Erickson,

Casañola-Martin,

Han

et al. 2024

J. Phys. Chem. B

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The development of reusable polymeric materials inspires an attempt to combine renewable biomass with upcycling to form a biorenewable closed system. It has been reported that 2,5-furandicarboxylic acid (FDCA) can be recovered for recycling when incorporated as monomers into photodegradable polymeric systems. Here, we develop a procedure to better understand the photodegradation reactions combining density functional theory (DFT) based time-dependent excited-state molecular dynamics (TDESMD) studies with machine learning-based quantitative structure−activity relationships (QSAR) methodology. This procedure allows for the unveiling of hidden structural features between active orbitals that affect the rate of photodegradation and is coined InfoTDESMD. Findings show that electrotopological features are influential factors affecting the rate of photodegradation in differing environments. Additionally, statistical validations and knowledge-based analysis of descriptors are conducted to further understand the structural features' influence on the rate of photodegradation of polymeric materials.

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Sm3+ induced-SrWO4 phosphor: analysis of photoluminescence and photocatalytic properties with electron density distribution studies

Cited by 28 publications

References 45 publications

Red emitting Eu³⁺ induced SrWO₄ materials: synthesis, structural, morphological and photoluminescence analysis

Red emitting Eu³⁺ induced SrWO₄ materials: synthesis, structural, morphological and photoluminescence analysis

Effect of BaSnO₃ on structural and electrical properties of lead free Na_0.5Bi_0.5TiO₃ ceramic solid solution

Relationships between the Photodegradation Reaction Rate and Structural Properties of Polymer Systems

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Sm3+ induced-SrWO4 phosphor: analysis of photoluminescence and photocatalytic properties with electron density distribution studies

Cited by 28 publications

References 45 publications

Red emitting Eu3+ induced SrWO4 materials: synthesis, structural, morphological and photoluminescence analysis

Red emitting Eu3+ induced SrWO4 materials: synthesis, structural, morphological and photoluminescence analysis

Effect of BaSnO3 on structural and electrical properties of lead free Na0.5Bi0.5TiO3 ceramic solid solution

Relationships between the Photodegradation Reaction Rate and Structural Properties of Polymer Systems

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Product

Resources

About

Red emitting Eu³⁺ induced SrWO₄ materials: synthesis, structural, morphological and photoluminescence analysis

Red emitting Eu³⁺ induced SrWO₄ materials: synthesis, structural, morphological and photoluminescence analysis

Effect of BaSnO₃ on structural and electrical properties of lead free Na_0.5Bi_0.5TiO₃ ceramic solid solution