The solar cells as alternative energy

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To circumvent the problems due to the exhaustion of fossil fuels, Benoit Marsan, professor at UQAM's Department of Chemistry and specialist in electrochemistry, 18 years been working on the improvement of solar cells electrochimiques.Ses avancees him in the matter allowed to file two patents previously.

The first allows him to protect a new method of preparation of the cathode, made of a thin layer of cobalt sulphide almost transparent, and its application in solar cell. Very easy to make and inexpensive, the cathode is more catalytic than those commonly used in electrochemical solar cells, made from platinum. This cathode, which can be employed in from batteries of different technologies is also currently testee by a Japanese company in solar cells is based nanocrystalline titanium dioxide sensitized by a dye (Gratzel battery type).

The second patent relates to the discovery of new families of redox couples presenting exceptional features that can be employed in many high-tech applications including solar cells. They are transparent, non-corrosive, highly conductive and usually possess greater electrochemical reversibility. Moreover, their oxidation-reduction can be modulated depending on the nature of the molecules used, thus leading to larger photovoltages.

A third patent is pending and will seek to protect the semiconductor anode. The ultimate challenge will be to integrate all these components in one and the same stack. His lab then plans to integrate this battery has a vehicle to maintain the battery charge or even cover an entire vehicle. "We could not generate enough power to propel the vehicle, precise Benoit Marsan. But we could certainly reduce the consumption of gasoline substantial way."

contacts:
- Dr. Benoit Marsan, Chair of the Search Committee - Department of Chemistry
and Biochemistry - University of Quebec at Montreal, CP 8888, Stn.
Downtown, Montreal (Quebec), Canada H3C 3P8 - email:
marsan.benoit@uqam.ca
sources: http://www.sciences.uqam.ca/scexp/17janv05.html#rech7
Editor: Elodie Pinot, OTTAWA, sciefran@ambafrance-ca.org

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