December 1, 2011
New Type Of Solar Cell Retains High Efficiency For Long Periods
The latest episode in the American Chemical Society's (ACS) award-winning "Global Challenges/Chemistry Solutions" podcast series features a new solar cell with high efficiency in converting sunlight into electricity and the durability to last and last.
In the podcast, Michael Graetzel, Ph.D., describes research that aimed to develop an improved version of a highly promising solar cell that is less expensive than conventional solar cells made from the semi-conductor material, silicon. These so-called dye-sensitized solar cells (DSCs), or Graetzel cells (named for the discoverer, Michael Graetzel), have other advantages. They can be manufactured in light-weight flexible sheets, for instance, that are more durable and suitable for roll-up applications such as window shades. Hindering commercial use of DSCs has been their lack of stability, with the electricity output tending to decline over time. Graetzel is with the Ãcole Polytechnique FÃ©dÃ©rale de Lausanne in Switzerland.
The new podcast is available without charge at iTunes and from www.acs.org/globalchallenges.
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