Journal
THIN SOLID FILMS
Volume 516, Issue 20, Pages 7144-7148Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2007.12.084
Keywords
organic solar cells; exciton transport; mobility effects; charge separation
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A generalized solar cell model for excitonic and classical, bipolar solar cells is developed that describes the combined transport and interaction of electrons, holes and excitons. Both, conventional inorganic solar cells as well as organic solar cells, where excitons play a dominant role for energy transport, turn out to be special cases of this model. Due to the inclusion of photon recycling effects, the approach is compatible with the principle of detailed balance and the Shockley-Queisser limit. We show how varying the interaction between excitons and charge carriers as well as varying the respective mobilities of the different species changes the operation mode of the solar cell path between excitonic and bipolar. (c) 2008 Published by Elsevier B.V.
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