dc.creator | Patrocinio, A. O. T. | |
dc.creator | El-Bacha, A. S. | |
dc.creator | Paniago, E. B. | |
dc.creator | Paniago, R. M. | |
dc.creator | Murakami Iha, N. Y. | |
dc.date.accessioned | 2013-10-21T12:11:02Z | |
dc.date.accessioned | 2018-07-04T16:26:10Z | |
dc.date.available | 2013-10-21T12:11:02Z | |
dc.date.available | 2018-07-04T16:26:10Z | |
dc.date.created | 2013-10-21T12:11:02Z | |
dc.date.issued | 2012 | |
dc.identifier | INTERNATIONAL JOURNAL OF PHOTOENERGY, NEW YORK, v. 279, n. 24, supl. 1, Part 3, pp. 4615-4628, DEC, 2012 | |
dc.identifier | 1110-662X | |
dc.identifier | http://www.producao.usp.br/handle/BDPI/35338 | |
dc.identifier | 10.1155/2012/638571 | |
dc.identifier | http://dx.doi.org/10.1155/2012/638571 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1635811 | |
dc.description.abstract | The influence of pH during hydrolysis of titanium(IV) isopropoxide on the morphological and electronic properties of TiO2 nanoparticles prepared by the sol-gel method is investigated and correlated to the photoelectrochemical parameters of dye-sensitized solar cells (DSCs) based on TiO2 films. Nanoparticles prepared under acid pH exhibit smaller particle size and higher surface area, which result in higher dye loadings and better short-circuit current densities than DSCs based on alkaline TiO2-processed films. On the other hand, the product of charge collection and separation quantum yields in films with TiO2 obtained by alkaline hydrolysis is c. a. 27% higher than for the acid TiO2 films. The combination of acid and alkaline TiO2 nanoparticles as mesoporous layer in DSCs results in a synergic effect with overall efficiencies up to 6.3%, which is better than the results found for devices employing one of the nanoparticles separately. These distinct nanoparticles can be also combined by using the layer-by-layer technique (LbL) to prepare compact TiO2 films applied before the mesoporous layer. DSCs employing photoanodes with 30 TiO2 bilayers have shown efficiencies up to 12% higher than the nontreated photoanode ones. These results can be conveniently used to develop optimized synthetic procedures of TiO2 nanoparticles for several dye-sensitized solar cell applications. | |
dc.language | eng | |
dc.publisher | HINDAWI PUBLISHING CORPORATION | |
dc.publisher | NEW YORK | |
dc.relation | INTERNATIONAL JOURNAL OF PHOTOENERGY | |
dc.rights | Copyright HINDAWI PUBLISHING CORPORATION | |
dc.rights | openAccess | |
dc.title | Influence of the Sol-Gel pH Process and Compact Film on the Efficiency of TiO2-Based Dye-Sensitized Solar Cells | |
dc.type | Artículos de revistas | |