Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Microstructural, morphological and electrochemical analysis of semiconductor spin-coated thin films electrodes for dye-sensitized solar cells with natural dyes as sensitizers
Submission Author:
Daniel Sampaio , RJ
Co-Authors:
Breno Ferreira, SURESH BABU RAJENDRAN, SASIKUMAR YESUDASS, Ana Barros, Daniel Sampaio
Presenter: Daniel Sampaio
doi://10.26678/ABCM.COBEM2017.COB17-2136
Abstract
Dye-sensitized solar cells (DSSC’s) have been considered as an important energy resource in recent years due to its low-cost fabrication compared to silicon-based and thin film solar cells. A typical DSSC consists of three main components: a dye-sensitized semiconductor photo-anode, an electrolyte with a redox couple and a conductive counter electrode. The natural dyes containing anthocyanins, were extracted from flowers and vegetables by simple extraction techniques and used as photosensitizers in the dye-sensitized solar cells. Photo-anodes films with different nanostructured semiconductors were prepared and characterized by Fourier Transform Infrared Spectroscopy, Atomic Force Microscopy and Scanning Electron Microscopy. The Fourier Transform Infrared spectrum was obtained after the dye coating on the TiO2 layer, to identify the light absorbance behavior according to the functional groups present in the dye molecules. The photovoltaic performance was carried out to understand the effect of the different photo-anode and the interaction with the dyes on the cell’s efficiency. A new work has been designed with the results of our efforts towards the construction, characterization and integration of the DSSC’s. The increasing of short-circuit current and chemical stability of the device reveal the promising characteristics to extend the natural dye-based DSSCs fabrication for large scale production.
Keywords
solar cells, natural dyes, thin films
