Evidence for barrierless auger recombination in PbSe nanocrystals: A pressure-dependent study of transient optical absorption

Jeffrey M. Pietryga, Kirill K. Zhuravlev, Michael Whitehead, Victor I Klimov, Richard D Schaller

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

We report rates of Auger recombination (AR) in zero-dimensional (0D) PbSe nanocrystals as a function of energy gap (Eg) by using applied hydrostatic pressure to controllably shift Eg according to the bulk deformation potential. Our studies reveal that the rate of AR in nanocrystals is insensitive to energy gap, which is in contrast with bulk semiconductors where this rate shows exponential dependence on Eg. These measurements represent the first direct experimental evidence that AR in 0D nanomaterials is barrierless, in distinction from bulk semiconductors.

Original languageEnglish
Article number217401
JournalPhysical Review Letters
Volume101
Issue number21
DOIs
Publication statusPublished - Nov 18 2008

Fingerprint

nanocrystals
optical absorption
hydrostatic pressure
shift

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Evidence for barrierless auger recombination in PbSe nanocrystals : A pressure-dependent study of transient optical absorption. / Pietryga, Jeffrey M.; Zhuravlev, Kirill K.; Whitehead, Michael; Klimov, Victor I; Schaller, Richard D.

In: Physical Review Letters, Vol. 101, No. 21, 217401, 18.11.2008.

Research output: Contribution to journalArticle

@article{81dc4cc749e641a8aae660b73be9a06b,
title = "Evidence for barrierless auger recombination in PbSe nanocrystals: A pressure-dependent study of transient optical absorption",
abstract = "We report rates of Auger recombination (AR) in zero-dimensional (0D) PbSe nanocrystals as a function of energy gap (Eg) by using applied hydrostatic pressure to controllably shift Eg according to the bulk deformation potential. Our studies reveal that the rate of AR in nanocrystals is insensitive to energy gap, which is in contrast with bulk semiconductors where this rate shows exponential dependence on Eg. These measurements represent the first direct experimental evidence that AR in 0D nanomaterials is barrierless, in distinction from bulk semiconductors.",
author = "Pietryga, {Jeffrey M.} and Zhuravlev, {Kirill K.} and Michael Whitehead and Klimov, {Victor I} and Schaller, {Richard D}",
year = "2008",
month = "11",
day = "18",
doi = "10.1103/PhysRevLett.101.217401",
language = "English",
volume = "101",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "21",

}

TY - JOUR

T1 - Evidence for barrierless auger recombination in PbSe nanocrystals

T2 - A pressure-dependent study of transient optical absorption

AU - Pietryga, Jeffrey M.

AU - Zhuravlev, Kirill K.

AU - Whitehead, Michael

AU - Klimov, Victor I

AU - Schaller, Richard D

PY - 2008/11/18

Y1 - 2008/11/18

N2 - We report rates of Auger recombination (AR) in zero-dimensional (0D) PbSe nanocrystals as a function of energy gap (Eg) by using applied hydrostatic pressure to controllably shift Eg according to the bulk deformation potential. Our studies reveal that the rate of AR in nanocrystals is insensitive to energy gap, which is in contrast with bulk semiconductors where this rate shows exponential dependence on Eg. These measurements represent the first direct experimental evidence that AR in 0D nanomaterials is barrierless, in distinction from bulk semiconductors.

AB - We report rates of Auger recombination (AR) in zero-dimensional (0D) PbSe nanocrystals as a function of energy gap (Eg) by using applied hydrostatic pressure to controllably shift Eg according to the bulk deformation potential. Our studies reveal that the rate of AR in nanocrystals is insensitive to energy gap, which is in contrast with bulk semiconductors where this rate shows exponential dependence on Eg. These measurements represent the first direct experimental evidence that AR in 0D nanomaterials is barrierless, in distinction from bulk semiconductors.

UR - http://www.scopus.com/inward/record.url?scp=56849105697&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=56849105697&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.101.217401

DO - 10.1103/PhysRevLett.101.217401

M3 - Article

AN - SCOPUS:56849105697

VL - 101

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 21

M1 - 217401

ER -