ZnO films and nanorod/shell arrays electrodeposited on PET-ITO electrodes |
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| Affiliation: | 1. National Institute of Materials Physics, P.O. Box MG 7, 077125 Magurele, Romania;2. METAV-CD, 31 CA Rosetti Street, 020015 Bucharest, Romania;1. Department of Optical Science and Engineering, Fudan University, Shanghai, 200433, China;2. Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, Fudan University, Shanghai, 200433, China;3. Key Lab for Micro and Nano Photonic Structures, Ministry of Education, Fudan University, Shanghai, 200433, China;1. Instituto de Física de São Carlos, Universidade de São Paulo, Caixa Postal 369, 13560-970 São Carlos, SP, Brazil;2. Departamento de Física e Química, Universidade Estadual Paulista, Campus Ilha Solteira, 15385-000 Ilha Solteira, SP, Brazil;3. Departamento de Física, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil;1. AIT-Austrian Institute of Technology, Energy Department, Photovoltaic Systems, Giefinggasse 2, 1210, Vienna, Austria;2. AIT-Austrian Institute of Technology, Mobility Department, Electric Drive Technologies, Giefinggasse 2, 1210, Vienna, Austria;3. NanoTecCenter Weiz Forschungsgesellschaft mbH, Franz-Pichler Straße 32, A-8160 Weiz, Austria;4. Institute of Solid State Physics, Graz University of Technology, Petersgasse 16, A-8010 Graz, Austria;1. Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia;2. Functional Devices Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia |
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| Abstract: | In this work, ZnO films, nanorod and nanorod/shell arrays were synthesized on the surface of PET-ITO electrodes by electrochemical methods. ZnO films with high optical transmittance were prepared from a zinc nitrate solution using a pulsed current technique with a reduced pulse time (3 s). The X-ray diffraction pattern of ZnO film deposited on PET-ITO electrode showed that it has a polycrystalline structure with preferred orientations in the directions [0 0 2] and [1 0 3]. ZnO nanorods were synthesized on electrochemical seeded substrate in an aqueous solution containing zinc nitrate and hexamethylenetetramine. In order to increase the stability of PET-ITO electrode to electrochemical and chemical stresses during ZnO nanorods deposition the surface of the electrode was treated with a 17 wt% NH4F aqueous solution. Electrochemical stability of PET-ITO electrode was evaluated in a solution containing nitrate ions and hexamethylenetetramine. ZnO nanorod/shell arrays were fabricated using eosin Y as nanostructuring agent. Photoluminescence spectra of ZnO nanorod and ZnO nanorod/shell arrays prepared on the surface of PET-ITO electrode were discussed comparatively. By employing the 1.5 μm-length ZnO nanorod/shell array covered with a Cu2O film a photovoltaic device was fabricated on the PET-ITO substrate. |
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