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- W2052504022 abstract "Recombination of photogenerated charge carriers in polymer bulk heterojunction (BHJ) solar cells reduces the short circuit current (Jsc) and the fill factor (FF). Identifying the mechanism of recombination is, therefore, fundamentally important for increasing the power conversion efficiency. Light intensity and temperature dependent current-voltage measurements on polymer BHJ cells made from a variety of different semiconducting polymers and fullerenes show that the recombination kinetics are voltage dependent and evolve from first order recombination at short circuit to bimolecular recombination at open circuit as a result of increasing the voltage-dependent charge carrier density in the cell. The missing 0.3V inferred from comparison of the band gaps of the bulk heterojunction materials and the measured open circuit voltage at room temperature results from the temperature dependence of the quasi-Fermi-levels in the polymer and fullerene domains - a conclusion based upon the fundamental statistics of Fermions." @default.
- W2052504022 created "2016-06-24" @default.
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- W2052504022 date "2010-12-16" @default.
- W2052504022 modified "2023-10-11" @default.
- W2052504022 title "Recombination in polymer-fullerene bulk heterojunction solar cells" @default.
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- W2052504022 doi "https://doi.org/10.1103/physrevb.82.245207" @default.
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