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Morphological dependence of electrodeposited ZnO-based semiconductors under different growth conditions
|Jesús Cembrero , Mariola Tortosa , Miguel A. Mollar , Hai Ning Cui , Bernabé Marí Soucase|
Universitat Politčcnica de Valčncia (UPV-Spain), Camí de Vera s/n, Valčncia 46022, Spain
Control of morphology, orientation and assembly properties of oxide nanostructures are of great importance for their implementation on technological devices. Electrochemical procedures permit the synthesis of ZnO films on different morphologies depending on both the solvent and the substrate used. Aqueous electrodeposition of ZnO produces discontinuous structures under the form of nanocolumns while using a non-aqueous solvent, like dimethylsulfoxide (DMSO), continuous films are mainly obtained. Obviously, both morphologies exhibit different properties. Continuous films are highly transparent due to the flatness of the surface which results in low reflectance values. On the other hand nanocolumnar ZnO structures obtained from aqueous solutions exhibit an intense photoluminescence. The results point out the advantage of using dimethylsulfoxide when uniform, oriented and highly transparent films are required while using aqueous bathes produce perfectly defined hexagonal ZnO columns which can be fully oriented by chosen a suitable substrate.
First results of in-situ transmittance measurements showing the kinetics of the growth mechanisms will be discussed.
Presentation: Oral at E-MRS Fall Meeting 2007, Symposium A, by Bernabé Marí Soucase
See On-line Journal of E-MRS Fall Meeting 2007
Submitted: 2007-05-14 20:26 Revised: 2009-06-07 00:44