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High-efficiency solid-state dye-sensitized solar cells: fast charge extraction through self-assembled 3D fibrous

Nicolas Tétreault1, Endre Horváth, Thomas Moehl

  • 1Laboratory of Photonic and Interfaces, Institute of Physical Chemistry, Physics, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland. nicolas.tetreault@epfl.ch

ACS Nano
|November 19, 2010
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...