A. Rizzo, A. Cester, L. Torto, M. Barbato, N. Wrachien, Nicolò Lago, Michael Corazza, F. Krebs, S. Gevorgyan
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Effects of current stress and thermal storage on polymeric heterojunction P3HT:PCBM solar cell
We subjected P3HT:PCBM solar cells to electrical constant current stress and thermal storage. We employed the impedance spectroscopy technique combined to conventional DC measurements for device characterization during all stresses. We identified and separated different contributions affecting the open circuit voltage and short circuit current. Several mechanisms are behind these changes during the stresses; in particular, we underlined the exciton recombination rate and the variation of the built-in voltage.
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