Size and temperature dependence of band-edge excitons in PbSe nanowires

Janice E. Boercker; Emily M. Clifton; Joseph G. Tischler; Edward E. Foos; Thomas J. Zega; Mark E. Twigg; Rhonda M. Stroud

doi:10.1021/jz200115w

Size and temperature dependence of band-edge excitons in PbSe nanowires

Janice E. Boercker, Emily M. Clifton, Joseph G. Tischler, Edward E. Foos, Thomas J. Zega, Mark E. Twigg, Rhonda M. Stroud

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

We report the attenuance and temperature-dependent photoluminescence spectra of PbSe nanowires with diameters between 5.6 and 26.4 nm (12-23% relative standard deviation) and lengths greater than 1 μm. The nanowire first exciton energy varies between 0.3 and 0.6 eV as the diameter decreases from 26.4 to 5.6 nm, respectively. Compared to spherical PbSe nanocrystals, PbSe nanowires show less quantum confinement and larger Stokes shifts. The band gap temperature coefficient (dE_g/dT) decreases as the nanowire diameter decreases, consistent with previous results for PbSe spherical nanocrystals.

Original language	English (US)
Pages (from-to)	527-531
Number of pages	5
Journal	Journal of Physical Chemistry Letters
Volume	2
Issue number	6
DOIs	https://doi.org/10.1021/jz200115w
State	Published - Mar 17 2011
Externally published	Yes

ASJC Scopus subject areas

General Materials Science
Physical and Theoretical Chemistry

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title = "Size and temperature dependence of band-edge excitons in PbSe nanowires",

abstract = "We report the attenuance and temperature-dependent photoluminescence spectra of PbSe nanowires with diameters between 5.6 and 26.4 nm (12-23% relative standard deviation) and lengths greater than 1 μm. The nanowire first exciton energy varies between 0.3 and 0.6 eV as the diameter decreases from 26.4 to 5.6 nm, respectively. Compared to spherical PbSe nanocrystals, PbSe nanowires show less quantum confinement and larger Stokes shifts. The band gap temperature coefficient (dEg/dT) decreases as the nanowire diameter decreases, consistent with previous results for PbSe spherical nanocrystals.",

author = "Boercker, {Janice E.} and Clifton, {Emily M.} and Tischler, {Joseph G.} and Foos, {Edward E.} and Zega, {Thomas J.} and Twigg, {Mark E.} and Stroud, {Rhonda M.}",

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T1 - Size and temperature dependence of band-edge excitons in PbSe nanowires

AU - Boercker, Janice E.

AU - Clifton, Emily M.

AU - Tischler, Joseph G.

AU - Foos, Edward E.

AU - Zega, Thomas J.

AU - Twigg, Mark E.

AU - Stroud, Rhonda M.

PY - 2011/3/17

Y1 - 2011/3/17

N2 - We report the attenuance and temperature-dependent photoluminescence spectra of PbSe nanowires with diameters between 5.6 and 26.4 nm (12-23% relative standard deviation) and lengths greater than 1 μm. The nanowire first exciton energy varies between 0.3 and 0.6 eV as the diameter decreases from 26.4 to 5.6 nm, respectively. Compared to spherical PbSe nanocrystals, PbSe nanowires show less quantum confinement and larger Stokes shifts. The band gap temperature coefficient (dEg/dT) decreases as the nanowire diameter decreases, consistent with previous results for PbSe spherical nanocrystals.

AB - We report the attenuance and temperature-dependent photoluminescence spectra of PbSe nanowires with diameters between 5.6 and 26.4 nm (12-23% relative standard deviation) and lengths greater than 1 μm. The nanowire first exciton energy varies between 0.3 and 0.6 eV as the diameter decreases from 26.4 to 5.6 nm, respectively. Compared to spherical PbSe nanocrystals, PbSe nanowires show less quantum confinement and larger Stokes shifts. The band gap temperature coefficient (dEg/dT) decreases as the nanowire diameter decreases, consistent with previous results for PbSe spherical nanocrystals.

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Size and temperature dependence of band-edge excitons in PbSe nanowires

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