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Future prospects for DSSCs and its fabrication parameters with efficiency enhancement

Pradeep Kumar

Abstract


Dye-sensitized solar cells which combine the unique properties of both the organic compound and inorganic compound have attracted the attention of scientists. Thin film of TiO2 paste deposited on ITO (Indium doped Tin Oxide) acts as one electrode, Carbon electrode acts as counter electrode and ruthenium as the sensitizer. I-/I3- is used as the electrolyte. An increase of output potential when the cell was heated over a short period of time and when thicker TiO2 was applied were observed followed by the decreasing in efficiency of over-coating and over- heating. The evidence strongly supports the electron trapping mechanism for generating the dark current. In DSSC these two tasks are separate. Charge separation is done by photo-induced injection to the conduction band and such created carriers are transported to charge collector. By using dyes which have broad absorption band, the solar cell is capable to harvest large fraction of sunlight. In this paper the basic construction and mode of operation of solar cells based on dyes is described.

Keywords


Dye sensitized solar cells, sensitizer, counter electrodes, Efficiency

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References


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