Non-poissonian exciton populations in semiconductor Nanocrystals via carrier multiplication

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

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
Article number097402
JournalPhysical Review Letters
Volume96
Issue number9
DOIs
Publication statusPublished - 2006

Fingerprint

multiplication
nanocrystals
excitons
photons
nonlinear optics
lasing
energy
optics
wavelengths
excitation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

@article{e4c50bb273f6476fa23341c58ab4082d,
title = "Non-poissonian exciton populations in semiconductor Nanocrystals via carrier multiplication",
abstract = "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.",
author = "Schaller, {Richard D} and Klimov, {Victor I}",
year = "2006",
doi = "10.1103/PhysRevLett.96.097402",
language = "English",
volume = "96",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "9",

}

TY - JOUR

T1 - Non-poissonian exciton populations in semiconductor Nanocrystals via carrier multiplication

AU - Schaller, Richard D

AU - Klimov, Victor I

PY - 2006

Y1 - 2006

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=33644784696&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33644784696&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.96.097402

DO - 10.1103/PhysRevLett.96.097402

M3 - Article

VL - 96

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 9

M1 - 097402

ER -