ESR and photoluminescence properties of Cu doped ZnS nanoparticles

Sambasivam, Sangaraju; Sathyaseelan, B.; Reddy, D. Amaranatha; Reddy, B.K.; Jayasankar, C.K.

doi:10.1016/j.saa.2008.05.009

Cited by 44 publications

(24 citation statements)

References 23 publications

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“…The color output of nanomaterials is very important for their applications as light emitting displays. In most of the previous studies [10][11][12][13][14], much effort has been made to tailor the luminescence properties. Novel luminescence characteristics, such as, stable and visible-light emissions with different colors were observed from doped ZnS nanoparticles at room temperature [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of Ce, Cu co-doped ZnS nanoparticles

Harish

Reddy

2015

Physica B: Condensed Matter

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of Ce, Cu co-doped ZnS nanoparticles

Harish

Reddy

2015

Physica B: Condensed Matter

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“…Moreover, the increase in Cu concentration leads to a quenching of PL intensity which is an obvious evidence for Cu incorporation in the ZnS matrix. Indeed, Sambasivam et al [44] explained the decrease in PL intensity with increasing Cu concentration by the repeated excitation within the copper sites of the samples. Poornaprakash et al [45] observed the same behavior for ZnS:Fe thin films.…”

Section: Photoluminescence Studiesmentioning

confidence: 99%

Effect of copper concentration on the physical properties of ZnS:Cu alloys prepared by chemical bath deposition

Jrad

Naffouti

Nefzi

et al. 2016

J Mater Sci: Mater Electron

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ZnS:Cu thin films were deposited on glass substrates by chemical bath deposition technique. The structural, morphological, optical and electrical properties of the grown films were characterized by X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectrometry, scanning electron microscopy, spectrophotometry, spectrofluorimetry and Hall effect measurements. Both XRD and Raman analysis indicated the coexistence of both sphalerite ZnS and covellite CuS with cubic and hexagonal structures, respectively. The optical band gap of the films increased from 3.70 to 3.75 eV with Cu concentration increment. Photoluminescence studies revealed that the incorporation of Cu 2? ions in ZnS matrix blue shifted and quenched the emission bands. Electric resistivity, volume carrier concentration, surface carrier concentration and Hall mobility were determined from Hall effect measurements. Indeed, for pure sample, the obtained values were about 7.586 9 10 4 X cm, 1.472 9 10 11 cm -3 , 2.944 9 10 6 cm -2 and 5.590 9 10 2 cm 2 V -1 s -1 , respectively. However, after Cu incorporation, these values varied in the range of (2.273 9 10 4 -13.80 9 10 4 ) X cm, (2.334 9 10 11 -9.094 9 10 13 ) cm -3 , (4.668 9 10 6 -1.819 9 10 9 ) cm -2 and (3.092 9 10 -1 -1.937 9 10 2 ) cm 2 V -1 s -1 , respectively.

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“…Ln3+ -doped inorganic luminescent nanomaterials, emerging as a new class of luminescent bio-probes and as an alternative to conventional molecular probes, have been well developed and pushed forward with unprecedented speed towards diverse biomedical applications in recent years. These nanobioprobes inherit the unique optical properties of Ln 3+ ions such as long-lived luminescence, large antennagenerated Stokes or anti-Stokes shifts, narrow emission bands, high resistance to photo-bleaching and low toxicity [3]. It is well known that rare earth (RE) elements are effective luminescent centres for RE-doped semiconductors, because the excitation of the RE ions can occur by the recombination of photo generated carriers confined in the semiconductor, and subsequent energy transfer to the RE ions.…”

Section: Introductionmentioning

confidence: 99%