The news reporters obtained a quote from the research, "The solar cells have been studied by impedance spectroscopy over large frequency and applied voltage ranges in order to elucidate the inherent correlation between the photoelectrode structure and properties. The electrical response has been analyzed using an ad-hoc electrical model to extrapolate the electronic structure and charge carrier kinetic properties of the photoelectrodes. The two films exhibit very different density distributions of their trap states below the conduction band edge. Moreover, their electron lifetimes and transport times vary differently with the DOS due to different surface and conduction properties. The charge collection efficiency has been calculated by two different approaches, one being derived from first principles. Very high values are reported in all cases. Globally, the limitation of N719/ZnO solar cell performances is related to their open circuit voltage and their short circuit current."
According to the news reporters, the research concluded: "The latter point is discussed in the light of our impedance results and photoelectrode light absorption data."
For more information on this research see: Impedance spectroscopy study of N719-sensitized ZnO-based solar cells.
Our news correspondents report that additional information may be obtained by contacting T. Pauporte, St Gobain Res, F-93303 Aubervilliers,
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Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC
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