High efficiency carrier multiplication in PbSe nanocrystals: implications for solar energy conversion.

@article{Schaller2004HighEC,
  title={High efficiency carrier multiplication in PbSe nanocrystals: implications for solar energy conversion.},
  author={R. Schaller and V. Klimov},
  journal={Physical review letters},
  year={2004},
  volume={92 18},
  pages={
          186601
        }
}
  • R. Schaller, V. Klimov
  • Published 2004
  • Medicine, Physics
  • Physical review letters
  • We demonstrate for the first time that impact ionization (II) (the inverse of Auger recombination) occurs with very high efficiency in semiconductor nanocrystals (NCs). Interband optical excitation of PbSe NCs at low pump intensities, for which less than one exciton is initially generated per NC on average, results in the formation of two or more excitons (carrier multiplication) when pump photon energies are more than 3 times the NC band gap energy. The generation of multiexcitons from a… CONTINUE READING
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