Natural dyes as sensitizers to increase the efficiency in sensitized solar cells

19th Chilean Physics Symposium 2014

Cerda, Bayron^1 ; Sivakumar, R.^1 ; Paulraj, M.^1

Departament of Physics, Faculty of Physical and Mathematical Science, University of Concepcion, Concepcion, Chile^1

关键词: Counter electrodes;    Liquid electrolytes;    Photovoltaic property;    Semiconducting thin films;    Sensitized solar cells;    Spectral properties;    Thin conducting layers;    UV-Vis spectrophotometers;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/720/1/012030/pdf
DOI  :  10.1088/1742-6596/720/1/012030

来源: IOP

【 摘 要 】

A dye-sensitized solar cell (DSSC) is a sandwich type solar cell consisting of a photoelectrode, a counter electrode and a liquid electrolyte. The photo electrode comprises of a titanium dioxide semiconducting thin film grown over a glass substrate which in-turn has a transparent thin conducting layer of tin oxide film doped with fluorine (FTO) coated over it. The aim of this work is to develop photoelectrodes with different dyes to increase the efficiency of this type of solar cells. Dyes obtained from fresh sources of maqui, black myrtle, spinach and a dye mixture of spinach and spinach-maqui-myrtle were used. The technique used for the extraction of the dyes was maceration for one day, in methanol. Colourants and photoelectrodes were studied using, UV-vis spectrophotometer for their spectral properties. Their photovoltaic properties such as efficiency, fill factor, open circuit voltage and short circuit current were studied using a solar simulator and source meter unit.