High luminescent yield from Mn doped ZnS at yellow–orange region and 367nm

Sajan, P.; Vinod, R.; Bushiri, M. Junaid

doi:10.1016/j.jlumin.2014.09.041

Cited by 20 publications

(9 citation statements)

References 25 publications

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“…These XRD data gave broad diffraction peaks and its corresponding grain size, calculated using the Scherrer formulae, gave a value of about 10 nm. This result indicates that these microspheres are made of nanoregime particles and are similar to that of solvo‐hydrothermally grown ZnS reported previously .…”

Section: Resultssupporting

confidence: 88%

“…The cubic nature of the as‐prepared sample was confirmed from the XRD pattern as well as from the absence of a Raman peak at 286 cm –1 . The presence of a highly intense LO phonon–plasmon coupled mode (LOPC‐L – ) Raman band at 257 cm –1 is attributed to the increase in carrier concentration in S‐H grown ZnS as compared with previous reports .…”

Section: Resultssupporting

confidence: 62%

“…The presence of Zn and S vacancies, however, depends strongly on the growth process . The use of the acetonitrile as a solvent for the growth contributed to the increase in population of sulphur vacancies and consequently more carriers . The appearance of a broad visible emission from the sample is probably due to overlapping of blue and greenish‐yellow emissions.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis of cubic ZnS microspheres exhibiting broad visible emission for bioimaging applications

et al. 2015

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Biocompatible ZnS microspheres with an average diameter of 3.85 µm were grown by solvo-hydrothermal (S-H) method using water-acetonitrile-ethylenediamine (EDA) solution combination. ZnS microspheres were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), Fourier transform (FT)-Raman spectroscopy and Fourier transform infrared spectroscopy (FTIR) techniques. The broad photoluminescence (PL) emissions from 380-580 nm that were seen from the ZnS microspheres attributed to the increase in carrier concentration, as understood from the observed intense Raman band at 257 cm(-1). Cytotoxicity and haemocompatibility investigations of these ZnS microspheres revealed its biocompatibility. ZnS microspheres, along with biological cell lines, were giving visible light emission and could be used for bioimaging applications.

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Section: Resultssupporting

confidence: 88%

Section: Resultssupporting

confidence: 62%

Section: Resultsmentioning

confidence: 99%

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Synthesis of cubic ZnS microspheres exhibiting broad visible emission for bioimaging applications

et al. 2015

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“…By using Debye-Scherer's, the average crystalline sizes were found to be 3.7, 3.2 and 2.9 nm, respectively [14][15]. From XRD, the obtained diffraction peaks are decreases with the increase of dopant concentration as Co 2+ , it's indicate a smaller crystallite size with low crystallinity due to lattice distortions [15][16].…”

Section: Resultsmentioning

confidence: 99%

Investigating on Structural, Optical, Magnetic and Photocatalytic Activities of ZnS and Co2+: ZnS NPs Synthesized by Hydrothermal Process Under MeB Dye

Upputuri

Lakshmanan

Ramalakshmi

et al. 2021

Preprint

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In present work, the structural, morphological, optical and photocatalytic activities of ZnS and Co2+: ZnS NPs were prepared through chemical route as hydrothermal process at room temperature. ZnS and Co2+: ZnS were characterized by using various techniques such as, XRD, SEM-EDX, TEM-SAED, UV-visible, PL and BET. The spherical-like morphology with the average crystallite size was found to be 8 to 15 nm. Among them results, it showed that the Co2+ atoms were incorporated into the ZnS lattice, forming cubic phase as the Co2+ dopant concentration increases from 0 to 2 %. The band gap energy of the ZnS and Co2+: ZnS increases from 3.5 to 4.10 eV, which enables stronger absorption of UV region. During catalytic process, Co2+ act as electron trapping center, which inhibits the recombination of the photo induced holes and electrons as showed higher degradation efficiency for MeB.

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“…Recently, Mn doped ZnS nanoparticles (denoted by ZnS:Mn) is widely used in photonic, biological markers, photocatalytic applications and many other applications because they are wide band gap semiconductors with stable and strong PL intensity in the yellow-orange region and high luminescent efficiency (Bhargava et al 1994;Bhargava 1996;Pouretedal et al 2009;Chitkara et al 2011;Sajan et al 2015).…”

Section: Introductionmentioning

confidence: 99%

The photoluminescence enhancement of Mn2+ ions and the crystal field in ZnS:Mn nanoparticles covered by polyvinyl alcohol

et al. 2016

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The polyvinyl alcohol (PVA)-capped ZnS:Mn nanoparticles with Mn content of 8 mol% and different PVA mass (denoted as ZnS:Mn/PVA) are synthesized by co-precipitation method, in which PVA solution is mixed from the beginning with the initial solutions used to synthesize ZnS:Mn nanoparticles. The microstructures, morphology and average crystalline size of ZnS:Mn/PVA nanoparticles were investigated by X-ray diffraction patterns, high resolution transmission electron microscopy, thermal gravimetric analysis (TGA) and differential thermal gravimetric analysis and Fourier transform infrared absorption spectra. The role of PVA to the photoluminescence (PL) of Mn 2? ions in these nanoparticles at 300 K were studied by the PL and photoluminescence excitation (PLE) spectra. The investigated results show that the PVA covering for ZnS:Mn nanoparticles almost is not change the microstructure, morphology, the crystal field and the peak positions in their PL and PLE spectra, but the maximum intensity of peaks increased with PVA mass from 0.2 to 1.0 g. The clear peak positions in PLE spectra show that the energy levels of Mn 2? ions were splitted into multiple levels in the ZnS:Mn crystal field, that its strength D q was caculated. Furthermore, the effect of PVA on the PL enhancement of Mn 2? ions in ZnS:Mn/PVA nanoparticles also was explained.

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High luminescent yield from Mn doped ZnS at yellow–orange region and 367nm

Cited by 20 publications

References 25 publications

Synthesis of cubic ZnS microspheres exhibiting broad visible emission for bioimaging applications

Synthesis of cubic ZnS microspheres exhibiting broad visible emission for bioimaging applications

Investigating on Structural, Optical, Magnetic and Photocatalytic Activities of ZnS and Co2+: ZnS NPs Synthesized by Hydrothermal Process Under MeB Dye

The photoluminescence enhancement of Mn2+ ions and the crystal field in ZnS:Mn nanoparticles covered by polyvinyl alcohol

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