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Open Access item Synthesis and luminescence properties of electrodeposited ZnO films

Authors:Manzano, Cristina V.
Alegre, Daniel
Caballero-Calero, Olga
Alén, Benito
Martín-González, Marisol S.
Keywords:Conduction bands, Electrodeposition, II-VI semiconductors, Interstitials, Photoluminescence, Scanning electron microscopy, Semiconductor growth, semiconductor thin films, Ultraviolet spectra, Vacancies (crystal), Valence bands, Wide band gap semiconductors, X-ray diffraction, Zinc compounds
Issue Date:31-Aug-2011
Publisher:American Institute of Physics
Citation:Journal of Applied Physics, 110 (2011)
Abstract:Zinc oxide (ZnO) films have been grown on gold (111) by electrodeposition using two different OH− sources, nitrate and peroxide, in order to obtain a comparative study between them. The morphology, structural and optical characterization of the films were investigated depending on the solution used (nitrate and peroxide) and the applied potential. Scanning electron microscopy pictures show different morphologies in each case. X-ray diffraction confirms that the films are pure ZnO oriented along the (0002) direction. ZnO films have been studied by photoluminescence to identify the emission of defects in the visible range. A consistent model that explains the emissions for the different electrodeposited ZnO films is proposed. We have associated the green and yellow emissions to a transition from the donor OH− to the acceptor zinc vacancies (VZn−) and to interstitial oxygen (Oi0), respectively. The orange-red emission is probably due to transitions from the conducting band to Oi− and OZn0 defects and the infrared emission to transition from these Oi−/2− and OZn0/− defects to the valence band.
Description:8 páginas, 10 figuras.
Publisher version (URL):http://dx.doi.org/10.1063/1.3622627
Appears in Collections:(IMM-CNM) Artículos

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