Peak External Photocurrent Quantum Efficiency Exceeding 100% via MEG in a Quantum Dot Solar Cell

  title={Peak External Photocurrent Quantum Efficiency Exceeding 100% via MEG in a Quantum Dot Solar Cell},
  author={Octavi E. Semonin and J. Luther and S. Choi and H. Chen and J. Gao and A. Nozik and M. C. Beard},
  pages={1530 - 1533}
  • Octavi E. Semonin, J. Luther, +4 authors M. C. Beard
  • Published 2011
  • Materials Science, Medicine
  • Science
  • An experimental solar cell productively uses an extra fraction of high-energy light typically lost as heat. Multiple exciton generation (MEG) is a process that can occur in semiconductor nanocrystals, or quantum dots (QDs), whereby absorption of a photon bearing at least twice the bandgap energy produces two or more electron-hole pairs. Here, we report on photocurrent enhancement arising from MEG in lead selenide (PbSe) QD-based solar cells, as manifested by an external quantum efficiency (the… CONTINUE READING
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