Properties of Co‐doped ZnO films prepared by electrochemical deposition

Wang, Y. X.; Ding, X.; Cheng, Yan; Zhang, Y. J.; Yang, Lili; Liu, H. L.; Fan, Hougang; Liu, Y.

doi:10.1002/crat.200800466

Cited by 23 publications

(4 citation statements)

References 12 publications

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“…Enhancement in the optical band gap with doping has been reported by others. 26,27 It is well known that the properties of nanocrystalline materials change from their corresponding bulk properties, because the sizes of the crystallites become comparable to the Bohr excitonic radius. 28 In nanocrystalline materials, band bending effect can be expected at the grain boundaries as the surface to volume ratio is higher.…”

Section: Optical Studiesmentioning

confidence: 99%

Properties of Cd doped PbS thin films: doping concentration effect

Rajashree¹,

Balu²,

Nagarethinam³

2015

Surface Engineering

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Highly crystalline cadmium doped lead sulphide (PbS:Cd) thin films with different Cd doping concentrations (0, 2, 4, 6 and 8 at-%) were fabricated on glass substrates using spray pyrolysis technique. The X-ray diffraction (XRD) studies revealed that all the films exhibit face centred cubic structure with a preferential orientation along the (2 0 0) plane irrespective of Cd doping concentration. Optical studies showed that the band gap of doped films vary between 1?96 and 2?12 eV with increasing Cd content and the film coated with 6 at-% Cd dopant has a maximum transmittance of nearly equal to 77%. Electrical studies revealed that the film coated with 6 at-%Cd dopant has a maximum conductivity of 12?67610 21 V cm 21 . The obtained results infer that the PbS:Cd film coated with 6 at-%Cd dopant has better structural, morphological, optical and electrical properties.

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Section: Optical Studiesmentioning

confidence: 99%

Properties of Cd doped PbS thin films: doping concentration effect

Rajashree¹,

Balu²,

Nagarethinam³

2015

Surface Engineering

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“…Since then, investigation of TMdoped ZnO, especially Co-doped ZnO, has attracted considerable attention due to their unique properties. Various deposition techniques have been used for the preparation of Co-doped ZnO thin films [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Structure, microstructure and determination of optical constants from transmittance data of co-doped Zn0.90Co0.05M0.05O (M Al, Cu, Cd, Na) films

Roguai

Djelloul

Nouveau

et al. 2014

Journal of Alloys and Compounds

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ZnO, Zn 0.95 Co 0.05 O and Zn 0.90 Co 0.05 M 0.05 O (M@Al, Cd, Na, Cu) single phase films have been successfully synthesized by ultrasonic spray pyrolysis technique. Structural analysis by X-ray diffraction show that all the films have hexagonal wurtzite structure with an average crystallite size in the range of 19-25 nm. SEM analysis revealed that Cd and Na preserve the shape of nanopetals observed with ZnO or CoAZnO films, while the doping with Al or Cu promote the formation of dense films constituted of nanorods. By the application of Levenberg-Marquardt least square method, the experimental transmittance data were fitted perfectly with the transmittance data calculated via a combination of Wemple-DiDomenico model, absorption coefficient of an electronic transition and Tauc-Urbach model. The concentration of absorbing centres N Co and oscillator strength f of d-d transition of Co 2+ ions are calculated from Smakula's formula.

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“…Different technological processes can be used to deposit cobalt-doped ZnO in thin films [11][12][13][14]. The doping of ZnO with transition metal ions such as Co (substitution of Zn + 2 ions by Co + 2 ions) induces magnetic properties due to its possible applications in the field of spintronics.…”

Section: Introductionmentioning

confidence: 99%

Roles of Cobalt Doping on Structural and Optical of ZnO Thin Films by Ultrasonic Spray Pyrolysis

Roguai¹,

Djelloul²

2021

Thin Films

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Here we report a systematic study of structural, optical, and magnetic measurements of Zn1-xCoxO (x = 0–0.22 at.%) by Ultrasound pyrolysis spray technique. The hexagonal wurtzite structure of our films is confirmed by X-ray diffraction with an average crystallite size estimated in the range of 18–30 nm. For the optical proprieties, using the Levenberg–Marquardt least squares rule, the experimental transmission measurements were perfectly adapted to the transmission data calculated by a combination of the Wemple-DiDomenico model, the absorption coefficient of an electronic transition and the Tauc-Urbach model. The concentration of the NCo absorption centers and the oscillator intensity f of the d-d transition of Co2+ ions are determined by the Smakula method. The presence of high concentrations of localized states in the thin films is responsible for the reduction in the width of optical bandgap.

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Properties of Co‐doped ZnO films prepared by electrochemical deposition

Cited by 23 publications

References 12 publications

Properties of Cd doped PbS thin films: doping concentration effect

Properties of Cd doped PbS thin films: doping concentration effect

Structure, microstructure and determination of optical constants from transmittance data of co-doped Zn0.90Co0.05M0.05O (M Al, Cu, Cd, Na) films

Roles of Cobalt Doping on Structural and Optical of ZnO Thin Films by Ultrasonic Spray Pyrolysis

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