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NiSe2 as an efficient electrocatalyst for a Pt-free counter electrode of dye-sensitized solar cells

Feng Gong1, Xin Xu, Zhuoqun Li

  • 1Department of Chemistry & Lab of Advanced Materials, Fudan University, 2205 Songhu Road, Shanghai 200438, PR China.

Chemical Communications (Cambridge, England)
|January 17, 2013
PubMed

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A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...