Non-poissonian exciton populations in semiconductor Nanocrystals via carrier multiplication

Richard D. Schaller*, Victor I. Klimov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

72 Scopus citations


We analyze distributions of exciton populations in PbSe nanocrystal (NC) ensembles as a function of excitation wavelength. For photon energies that result in carrier multiplication, these distributions are non-Poissonian and are characterized by two dominant exciton multiplicities that are determined by the ratio of photon energy to NC energy gap. For certain photon energies, we produce photoexcited NC ensembles with a nearly pure single multiplicity that can be tuned from 1 to 7. This result can find applications ranging from lasing and nonlinear optics to photovoltaics and photocatalysis.

Original languageEnglish (US)
Article number097402
JournalPhysical review letters
Issue number9
StatePublished - Mar 13 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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