Details

Autor(en) / Beteiligte

• Ma, H.L.
• Liu, Z.W.
• Zeng, D.C.
• Zhong, M.L.
• Yu, H.Y.
• Mikmekova, E.

Titel

Nanostructured ZnO films with various morphologies prepared by ultrasonic spray pyrolysis and its growing process

Ist Teil von

• Applied surface science, 2013-10, Vol.283, p.1006-1011

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •Morphology controllable ZnO nanostructures were prepared by the USP method.•Various morphologies of nanosheets, nanocrystalline film and nanorods were observed.•The electric and photoluminescence properties were found dependent on the Ts.•The optical transmittance for all prepared samples was higher than 90%.•The growth mechanism of ZnO film involves island growth and diffusion. Nanostructured ZnO films were prepared by the ultrasonic spray pyrolysis method using Zn(CH3COO)2·2H2O as a precursor. The effects of substrate temperature (Ts) on the morphology and properties were systematically studied. As the Ts increased from 430°C to 610°C, the morphology of the film transforms from closed packed nanosheets to dense nanocrystalline film and then to hexagonal nanorod array. The dense film formed at a temperature of 550°C has the lowest electric resistivity and highest carrier concentration. The optical transmittance for all prepared samples was higher than 90%. The photoluminescence (PL) properties varied with the Ts due to the internal defect difference. The growth mechanism of ZnO film involves island growth and diffusion, which was evident by observing the samples prepared at various times.