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Nanocrystal Shape Control: Synthesis and Structure–Property Correlation in Shape‐Controlled ZnO Nanoparticles Prepared by Chemical Vapor Synthesis and their Application in Dye‐Sensitized Solar Cells (Adv. Funct. Mater. 6/2009) |
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| Authors: | Revathi R Bacsa Jeannette Dexpert‐Ghys Marc Verelst Andrea Falqui Bruno Machado Wolfgang S Bacsa Peter Chen Shaik M Zakeeruddin Michael Graetzel Philippe Serp |
| Affiliation: | 1. CNRS LCC UPR 8241 (Laboratoire de Chimie de Coordination) 205 Route de Narbonne, Université de Toulouse;2. UPS, INPT;3. LCC;4. F‐31077 Toulouse (France);5. Centre d'élaboration des matériaux et d'études structurales, CNRS 29, rue Jeanne‐Marvig, BP 4347, 31055 Toulouse (France);6. Istituto Italiano di Tecnologia/Electron Microscopy Laboratory Via Morengo, 30 Genova (Italy);7. Laboratório de Catálise e Materiais Departamento de Engenharia Quimica Faculdade de Engenharia Universidade do Porto, 4200‐465 Porto (Portugal);8. Laboratory for Photonics and Interfaces, Swiss Federal Institute of Technology Lausanne 1015 (Switzerland) |
| Abstract: | Here, the large scale synthesis of nanocrystalline ZnO spheres and tetrapods in the size range of 8–40 nm by chemical vapor synthesis using zinc metal as precursor is described. A detailed study of the effect of experimental parameters on the morphology and yield is presented. High‐resolution transmission electron microscopy images of the tetrapods show that they are formed by the self assembly of four nanorods in the vapor phase. The tetrapods have optical absorption coefficients that are one order of magnitude greater than the spheres and show intense UV luminescence whereas the spheres show only the green emission. The observed differences in the optical properties are related to the presence of surface defects present in the nanospheres. The tetrapods have increased efficiencies for application in dye sensitized solar cells when compared to spheres. |
| Keywords: | Chemical vapor synthesis Nanoparticles Solar cells Zinc Oxide |