Dye-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 were assembled and the photovoltaic parameters were obtained through J-V plots. DSSC with 0.031% of efficiency was demonstrated at -1.4 V of deposition potential.
Nanoparticles of TiO 2 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 TiO 2 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 photovoltaic devices to visible radiation, with films before thermal treatment, a short-circuit current density (J SC ) of 0.0012 mA/cm 2 was observed for the cell with NaTiNT, a current density of 0.0398 mA/cm 2 for the cell with Nanoribbons, and a current density of 0.4028 mA/cm 2 for the cell with TiO 2 as electrode. After thermal treatment, a short-circuit current density of 0.4269 mA/cm 2 was observed for the cell with NaTiNT, a current density of 0.0765 mA/cm 2 for the Nanoribbons cell, and, finally, a current density of 0.3310 mA/cm 2 for the cell with TiO 2 as electrode. The new morphological, structural and optical characteristics of these nanoparticles may contribute for the development and research of new generation photovoltaic devices.
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