Photovoltaic conversion by macromolecular thionine films

Tamilarasan, R. ; Natarajan, P. (1981) Photovoltaic conversion by macromolecular thionine films Nature, 292 . pp. 224-225. ISSN 0028-0836

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On excitation by light, thionine dye oxidizes Fe2+ ions in solution and the photoproducts undergo dark reactions to restore the starting materials. The photogalvanic (photovoltaic) potentials generated by this cyclic process can be demonstrated by means of a cell with two platinum electrodes, one illuminated and one in the dark. Light is converted more effectively into electricity in the totally illuminated thin-layer (TITL) cell with platinum and tin oxide electrodes, but the efficiency of the conversion is limited by energy-wasting back reactions in solution and by restriction on the concentration of the dye1. We now show that these limitations can be overcome if thick films (~10 μm) of thionine condensed with macromolecules are coated on to inert electrodes.

Item Type:Article
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ID Code:24419
Deposited On:29 Nov 2010 08:57
Last Modified:10 Jun 2011 06:03

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