Abstract
Nanostructured porous TiO2paste was deposited on the FTO conductive glass using squeeze printing technique in order to obtain a TiO2thin film with a thickness of 10 μm and an area of 4 cm2.Gardenia blue (GB)extracted fromGardeniajasminodeElliswas employed as the natural dye for a dye-sensitized solar cell (DSSC). Adsorption studies indicated that the maximum adsorption capacity of GB on the surface of TiO2thin film was approximately 417 mgGB/g TiO2photoelectrode. The commercial and natural dyes, N-719 andGB, respectively, were employed to measure the adsorption kinetic data, which were analyzed by pseudo-first-order and pseudo-second-order models. The energy conversion efficiency of the TiO2electrode with successive adsorptions ofGBdye was about 0.2%.
Highlights
Dye-sensitized solar cells (DSSCs) are devices for the conversion of visible light into electricity based on sensitization of wide-bandgap semiconductors
DSSCs are known to be closely related to the equilibrium amount of adsorbed dye on TiO2 thin film [13, 14]
The adsorption characteristics of the GB on TiO2 thin film and N-719 for the comparison purpose were evaluated on the basis of adsorption equilibrium and kinetic studies
Summary
Dye-sensitized solar cells (DSSCs) are devices for the conversion of visible light into electricity based on sensitization of wide-bandgap semiconductors. Natural dyes provide a viable alternative to expensive organic dyes for DSSCs. Many natural dyes including chlorophyll, anthocyanin [7,8,9], carotenoids [10], cyanidin, crocetin [11], and tannin [12] have been tested over the last two decades as suitable sensitizers for DSSCs. It has been generally known that the photovoltaic performance of DSSC is highly influenced by adsorption properties of dyes on TiO2 film. The influence of the adsorption properties between the GB dye and the TiO2 thin film on the energy conversion efficiency of the DSSCs was systematically investigated on the basis of the photovoltaic performance calculated from the IV curves. International Journal of Photoenergy obtained under different temperatures (288, 298, and 308 K) were analyzed by employing the pseudo-first-order and pseudo-second-order models
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