The effect of thikness on the structural and optical properties of SnO2thin films Prepared by chemical spray pyrolysis methode

Ghdeeb, Nadia Jasim

doi:10.9790/4861-06523745

Cited by 1 publication

(3 citation statements)

References 7 publications

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“…Figure 6a shows the optical energy gap values for allowed direct transition (ADT) which have the values 2.78, 2.7 and 2.63 eV for un-doped CdO and doped with 3% and 5% Co thin films respectively. The results agreeing with reported literature (2,16,29). These values are confirming the formation of nanostructures thin films (30).…”

Section: Energy Gap ( )supporting

confidence: 93%

“…The figure revealed a polycrystalline nature with cubic structure with diffraction peaks returning to the crystalline plane (111) (200) (202) (311) at 2 of 26.4ᵒ, 32.4ᵒ, 52.1ᵒ and 64.3ᵒ, respectively. This result agrees with articles in (2,10,16). That corresponds well with standard card of data (JCPDS Card No.…”

Section: Structural Analysis Xrd Characterizationsupporting

confidence: 92%

“…96-900-6693) (17). These peaks show a variation in their intensity with a strong, sharp peak toward a plane (111), that is a property possessed by high crystallization material and it is representing the preference for crystalline development, agrees with the results obtained by (16,18). The reason for the preference for film growth at the (111) peak is that the energy of the surface density of this orientation is lower than other crystalline orientations (19).…”

Section: Structural Analysis Xrd Characterizationsupporting

confidence: 81%

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Cobalt Effect on the Growth of Cadmium Oxide Nanostructure Prepared by Spray Pyrolysis Technique

Rzaij

Ibraheam²,

Abass

2021

Baghdad Sci.J

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Spray pyrolysis technique (SPT) is employed to synthesize cadmium oxide nanostructure with 3% and 5% Cobalt concentrations. Films are deposited on a glass substrate at 350 ᵒC with 150 nm thickness. The XRD analysis revealed a polycrystalline nature with cubic structure and (111) preferred orientation. Structural parameters represent lattice spacing, crystallite size, lattice parameter and dislocation density. Homogeneous surfaces and regular distribution of atoms were showed by atomic force microscope (AFM) with 1.03 nm average roughness and 1.22 nm root mean square roughness. Optical properties illustrated a high transmittance more than 85% in the range of visible spectrum and decreased with Co concentration increasing. The absorption coefficient values decreased with increasing wavelength and the prepared films had absorption coefficient values greater than 10 4 cm -1 . The optical energy gap values for allowing direct transition (ADT) varied from 2.78 to 2.63 eV with increasing Co concentration, while the energy gap for allowing indirect transition (AIDT) varied from 1.85 to 1.6 eV with Co concentration.

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