Identifying a Threshold Impurity Level for Organic Solar Cells : Enhanced First-Order Recombination Via Well-Defi ned PC 84 BM Traps in Organic Bulk Heterojunction Solar Cells

@inproceedings{Cowan2011IdentifyingAT,
  title={Identifying a Threshold Impurity Level for Organic Solar Cells : Enhanced First-Order Recombination Via Well-Defi ned PC 84 BM Traps in Organic Bulk Heterojunction Solar Cells},
  author={Sarah R. Cowan and Wei Lin Leong and Natalie Banerji and Gilles Dennler and Alan J. Heeger},
  year={2011}
}
Small amounts of impurity, even one part in one thousand, in polymer bulk heterojunction solar cells can alter the electronic properties of the device, including reducing the open circuit voltage, the short circuit current and the fi ll factor. Steady state studies show a dramatic increase in the trap-assisted recombination rate when [6,6]-phenyl C 84 butyric acid methyl ester (PC 84 BM) is introduced as a trap site in polymer bulk heterojunction solar cells made of a blend of the copolymer… CONTINUE READING
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