Structural properties and refractive index dispersion of cobalt doped SnO2 thin films

Habubi, Nadir F.; Mishjil, Khudheir A.; Chiad, Sami Salman

doi:10.1007/s12648-012-0223-y

Cited by 38 publications

(21 citation statements)

References 28 publications

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“…These parameters are also shown in Table I. These values are much smaller than the similar values calculated by Mishjil et al 47 and Habubi et al 48 for copper-doped and cobalt-doped SnO 2 thin films with a thickness of about 400 nm prepared by the SP method. The discrepancy is most probably related to deposition parameters, and composition of the films including the type and quantity of the dopant.…”

Section: Resultssupporting

confidence: 47%

Optical Parameters of Nanocrystalline SnO2:F Thin Films Prepared by the Spray Pyrolysis Method

Ikhmayies

2019

JOM

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SnO 2 thin films are usually used as fore contacts in superstrate thin film solar cells such as thin film CdS/CdTe solar cells. Doping SnO 2 with fluorine improves its electrical properties and increases its optical bandgap energy besides improving other optical parameters. SnO 2 :F thin films of thickness around 200 nm were deposited on glass substrates by the spray pyrolysis method at a substrate temperature T s = 480°C. X-ray diffraction and scanning electron microscopy showed that the films are nanocrystalline. The transmittance of the films was measured at room temperature in the wavelength range 290-1100 nm, and used to calculate the reflectance, which was in turn used to deduce the optical parameters, such as the extinction coefficient, refractive index, real and imaginary parts of the dielectric constant, and energy loss. The relationships between these parameters and photon energy were investigated and compared with the results obtained by other authors.

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Section: Resultssupporting

confidence: 47%

Optical Parameters of Nanocrystalline SnO2:F Thin Films Prepared by the Spray Pyrolysis Method

Ikhmayies

2019

JOM

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“…Morerecently Chetri and Choudhury[51] reported Urbach energies of 0.424 and 0.432 eV for SnO 2 nanoparticles annealed at 200 ºC (crystallite size 2.53 nm) and 600 ºC (crystallite size 6.45 nm), respectively. Regarding Co-doped SnO 2 , Habubi et al[52] reported E U values of 0.512 eV and 0.588 eV for Co:SnO 2 films with 3% and 7% of cobalt, respectively, and crystallite sizes of about 50 nm.…”

mentioning

confidence: 99%

Synthesis of sub-5 nm Co-doped SnO2 nanoparticles and their structural, microstructural, optical and photocatalytic properties

Entradas

Cabrita

Dalui

et al. 2014

Materials Chemistry and Physics

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A swift chemical route to synthesize Co-doped SnO 2 nanopowders is described. Pure andcrystalline nanoparticles were synthesized, with mean grain sizes < 5 nm and the dopant element homogeneously distributed in substitutional sites of the SnO 2 matrix. The UV-visible diffuse reflectance spectra of the Sn 1-x Co x O 2- samples reveal red shifts, the optical bandgap energies decreasing with increasing Co concentration. The samples' Urbach energies were calculated and correlated with their bandgap energies. The photocatalytic activity of the Sn 1-x Co x O 2- samples was investigated for the 4-hydroxylbenzoic acid (4-HBA) degradation process. A complete photodegradation of a 10 ppm 4-HBA solution was achieved using 0.02% (w/w) of Sn 0.95 Co 0.05 O 2- nanoparticles in 60 min of irradiation.

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“…indicates an increase in the reflectance intensity by increasing wavelength. transmittance is attributed to light scattering caused by the nanoparticles, where cobalt has higher refractive index [22] the (PVDF/Co-ZnFe2O4) nanocomposite film had the lower transmittance intensity.…”

Section: Reflectance and Transmittancementioning

confidence: 99%

“…A remarkable increase in the refractive index value (n) was observed in the PVDF by the addition of the Co-ZnFe2O4 nanoparticles. This increase can be attributed to the higher intermolecular chemical and physical interaction between the filler and the adjacent PVDF chain segments which lead an improvement of the films densities resulting in higher refractive indices and the higher refractive index [22].…”

Section: Refractive Indexmentioning

confidence: 99%

Study of PVDF/ (Co-ZnFe2O4 and Cu-ZnFe2O4) nanocomposite for the piezo-phototronics applications

El-Masry

Ramadan

2022

Preprint

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Polyvinylidene fluoride (PVDF) polymer is considered as a promising piezoelectric material whose optical properties need to be improved. Zinc ferrite is an excellent photoelectric material, in the present work it was doped separately by both cobalt and copper. Co-ZnFe2O4 and Cu-ZnFe2O4 nanoparticles were synthesized and characterized to be used as PVDF fillers, aiming to improve its optical properties. The optical properties as well as, the piezoelectric response of the prepared PVDF/ (Co-ZnFe2O4 and Cu-ZnFe2O4) nanocomposites were investigated. A remarkable improvement in the PVDF relative permittivity, optical conductivity, refractive index, non-linear susceptibility, and a great reduction in the band gap energy value is obtained by adding Co-ZnFe2O4 nanoparticles to it. However, Cu-ZnFe2O4 nanoparticles have limited improvement of the PVDF optical properties compared to the Co-ZnFe2O4 nanoparticles. The piezoelectric response of the PVDF polymer is clearly increased by the addition of both Co-ZnFe2O4 and Cu-ZnFe2O4 nanoparticles.

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Structural properties and refractive index dispersion of cobalt doped SnO2 thin films

Cited by 38 publications

References 28 publications

Optical Parameters of Nanocrystalline SnO2:F Thin Films Prepared by the Spray Pyrolysis Method

Optical Parameters of Nanocrystalline SnO2:F Thin Films Prepared by the Spray Pyrolysis Method

Synthesis of sub-5 nm Co-doped SnO2 nanoparticles and their structural, microstructural, optical and photocatalytic properties

Study of PVDF/ (Co-ZnFe2O4 and Cu-ZnFe2O4) nanocomposite for the piezo-phototronics applications

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