Influence of Cu doping on the structural, electrical and optical properties of ZnO

Ghosh, Arindam; Kumari, Neetu; Bhattacharjee, Ayon

doi:10.1007/s12043-014-0851-1

Cited by 27 publications

(17 citation statements)

References 44 publications

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“…Measured band gap for the pure ZnO is 2.96 eV, and for the Cu dopant in 0.30, 0.35, and 0.40 mM samples, the values are 3.06, 3.09, and 3.07 eV, respectively. An increase in the band gap is reported for Cu-and Aldoped ZnO [52]. Blue shift in the absorption peaks can be attributed to the Burstein-Moss (BM) effect resulting from the doping of TM metal [53] and the increase in optical band gap.…”

Section: Uv-vis Spectroscopymentioning

confidence: 95%

“…Blue shift in the absorption peaks can be attributed to the Burstein-Moss (BM) effect resulting from the doping of TM metal [53] and the increase in optical band gap. The observed blue shift could be associated with strong quantum confinement effect, surface plasmon resonance [53], poor crystallinity of the film [54], and/or a new compound based on Cu and Zn [52]. A reduction in the amount of the blue shift at higher Cu concentration is ascribed to band tailing by Cu mixed oxidation states [55].…”

Section: Uv-vis Spectroscopymentioning

confidence: 96%

“…Cu occupying the substitutional sites of ZnO lattice by doping in turn increases the carrier concentration, thereby increasing the band gap by Burstein-Moss effect [53]. Enhancement of the intensity of absorbance peaks than in the pure ZnO samples in the UV region as well as in the visible range is a result of Cu doping [52]. Generally, with an increase in the concentration of Cu dopants, the optical transmittance of the films will be reduced.…”

Section: Uv-vis Spectroscopymentioning

confidence: 99%

See 2 more Smart Citations

Role of defects in one-step synthesis of Cu-doped ZnO nano-coatings by electrodeposition method with enhanced magnetic and electrical properties

et al. 2017

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Section: Uv-vis Spectroscopymentioning

confidence: 95%

Section: Uv-vis Spectroscopymentioning

confidence: 96%

Section: Uv-vis Spectroscopymentioning

confidence: 99%

See 1 more Smart Citation

Role of defects in one-step synthesis of Cu-doped ZnO nano-coatings by electrodeposition method with enhanced magnetic and electrical properties

et al. 2017

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“…This narrowing of band gap became prominent as Zn 2+ is gradually substituted by Cu 2+ and Ag 2+ in the matrix of the materials and systematically increased the number of oxygen vacancies due to their ion radii and electronegativity [46]. More so, the impurities created a special defect, which simulates the Fermi level to rise towards the conduction [41,45,47,48] [3,17,54].…”

Section: Uv-visible Spectroscopymentioning

confidence: 99%

Green synthesis of zinc oxide nanoparticles and zinc oxide–silver, zinc oxide–copper nanocomposites using Bridelia ferruginea as biotemplate

et al. 2020

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The quest to synthesize nanomaterials with improved properties, but less undesirable effects on the environment necessitated this research. Zinc Oxide (ZnO) nanoparticles and zinc oxide-silver (ZnO-Ag), zinc oxide-copper (ZnO-Cu) nanocomposites were synthesized with pure eco-friendly dye extracted from Bridelia ferruginea, zinc acetate (Zn(CH 3 COO) 2 ) as host, copper acetate (Cu (CH 3 COO) 2 ), and silver nitrate (AgNO 3 ) as dopant precursors. Phytochemical screening of dyes showed high, presence of phenols and terpenoids. The nanomaterials were characterized by Fourier-transform infrared, X-ray diffraction, scanning electron microscopy with energy dispersive X-ray analysis, transmission electron microscopy and ultraviolet-visible spectroscopy. The results showed the capping agents in the dyes were responsible for reducing the bulk materials. The crystallinity of the nanomaterials were found to be 19.02, 18.98 and 18.90 nm for the ZnO, ZnO-Ag and ZnO-Cu nanoparticles respectively. The ZnO nanoparticles were flakelike in shape, whereas the Cu and Ag doped particles were spherical. An optical bandgap of 4.73 eV was recorded for the dye and 3.24 eV for the ZnO nanoparticles. This was narrowed to 3.18 and 3.13 eV by silver and copper dopant respectively. These results showed the nanoparticles as a potential agent for photovoltaics and other optical applications.

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“…4b inset of the TEM images correspond to the SAED of 5 %Mn doped ZnS.It consists of concentric rings which reveals that the products are crystalline and it corresponds to reflections from (111), (220), (311), (331) and (422) planes confirming the cubic ZnS. [18]. It acts as electron trapping center which results into nonradiative recombination.…”

Section: Microstructural Studiesmentioning

confidence: 95%

Paramagnetic nature of Mn doped ZnS nano particles in opto electronic device application

Suganthi¹,

Pushpanathan²

2016

J Mater Sci: Mater Electron

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Manganese (Mn 2? ) doped ZnS nano sized powder was prepared by co precipitation method with different concentration from 1 to 5 %. The X-ray diffraction pattern indicates that the prepared powders are in cubic structure with the crystallite sizes lie in the range of 10-12 nm. Diffuse reflectance studies enlightens that an increment in the band gap (3.38-3.55 eV) with increasing dopant. The morphology and size of the sample could be intuitively determined by field emission scanning electron microscope and it shows that ZnS and Mn doped ZnS nanoparticles are appeared as spherical shape. The replacement of Zn by Mn is confirmed by energy dispersive analysis. TEM images confirm the spherical shape of the nanoparticles and SAED images exhibit the crystalline nature and confirm the cubic nature of the synthesized samples. The prepared luminescent nanoparticles of Mn doped ZnS have emission peak at around 617 nm. The symmetry and electronic structure of the Mn doped samples are studied with electron paramagnetic resonance.The paramagnetic nature of Mn doped ZnS nano particles are validated by using vibrating sample magnetometer spectra at room temperature. Thermal analysis measurement of the samples shows that the thermal stability of Mn doped ZnS is higher than the undoped ZnS. This corroborates that ZnS:Mn doping is attributed to the removal of water and it enhanced the crystallinity.

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Influence of Cu doping on the structural, electrical and optical properties of ZnO

Cited by 27 publications

References 44 publications

Role of defects in one-step synthesis of Cu-doped ZnO nano-coatings by electrodeposition method with enhanced magnetic and electrical properties

Role of defects in one-step synthesis of Cu-doped ZnO nano-coatings by electrodeposition method with enhanced magnetic and electrical properties

Green synthesis of zinc oxide nanoparticles and zinc oxide–silver, zinc oxide–copper nanocomposites using Bridelia ferruginea as biotemplate

Paramagnetic nature of Mn doped ZnS nano particles in opto electronic device application

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