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Performance evaluation of titanium oxide deposited by electrophoresis in photoe...
Souza,Antonio Paulo Santos; Cavalcante,Natália Macêdo; Freire,Francisco Nivaldo Aguiar; Almeida,Ana Fabíola LeiteABSTRACT Nanoparticles of TiO2 have been the main semiconductor applied in Dye-sensitized solar cells (DSSCs). In this work, solar cells were developed from the electrophoretic deposition of anatase titanium dioxide (TiO2) films on conductive glasses. The electrophoretic deposition was perfomed with a constant voltage of 80V for 2 minutes and, after drying, the films were sintered at three different temperature...
Photoelectrodes with titanate nanotubes sensitized by mesoporphyrin derivative ...
Souza,Antonio Paulo Santos; Almeida,Ana Fabíola Leite; Conegero,Leila de Souza; Viana,Bartolomeu Cruz; Ferreira,Odair PastorABSTRACT Titanate nanotubes (TiNTs) with the chemical composition Na2Ti3O7.nH2O (NaTiNT) were obtained through a hydrothermal method in highly alkaline medium. Protonated titanates nanotubes (H-TiNTs), with the composition H2Ti3O7.nH2O, were prepared by ion exchange reaction through a suspension of Na2Ti3OγnH2O nanotubes in HCl medium, promoting the exchange of Na+ ions by H+. Both Na2Ti3O7.nH2O and H2Ti3O7.nH2...
Performance Evaluation of Titanate Nanotubes and Nanoribbons Deposited by Elect...
Souza,Antonio Paulo Santos; Ferreira,Odair Pastor; Nunes,Vanja Fontenele; Almeida,Ana Fabíola; Lima,Francisco Marcone; Freire,Francisco Nivaldo AguiarNanoparticles of TiO2 have been the main semiconductor applied in Dye-sensitized solar cells (DSSCs). In this work, titanate nanotubes (NaTiNT) and nanoribbons, were obtained by the hydrothermal method from TiO2 anatase. These materials were deposited on conductive substrate by electrophoresis, with and without thermal treatment, sensitized by ruthenium-based dye and used as work electrode. Exposing those photo...
Effects of Potential Deposition on the Parameters of ZnO dye-sensitized Solar C...
Nunes,Vanja Fontenele; Souza,Antonio Paulo Santos; Lima,Francisco; Oliveira,Gessé; Freire,Francisco Nivaldo; Almeida,Ana FabíolaDye-sensitized solar cells (DSSCs) are a feasible option for photovoltaic energy. Zinc oxide is an n-type semiconductor employed as photoanode on DSSCs. ZnO thin films were electrodeposited to study the effects of different potentials applied during deposition. SEM images, XRD and UV-Vis analysis were conducted to reveal the morphologic, structural and optical properties of the films at three potentials. DSSCs ...