Chemical Physics, volume 446, pages 92-107

On the kinetics and thermodynamics of excitons at the surface of semiconductor nanocrystals: Are there surface excitons?

Patanjali Kambhampati ¹

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Department of Chemistry, McGill University , Montreal, QC H3A 0B8, Canada. |

Publication type: Journal Article

Publication date: 2015-01-01

Elsevier

Journal: Chemical Physics

Quartile SCImago

Quartile WOS

Impact factor: 2.3

ISSN: 03010104

DOI: 10.1016/j.chemphys.2014.11.008

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Physical and Theoretical Chemistry

General Physics and Astronomy

Abstract

The surface of semiconductor nanocrystals is one of their defining features by virtue of their nanometer size. Yet the surface is presently among the most poorly understood aspects of nanocrystal science. This perspective provides an overview of spectroscopic work that has revealed the first insights into the nature of the surface, focusing upon CdSe nanocrystals. We focus on two aspects of surface processes in nanocrystals: the kinetics of surface trapping and the thermodynamics of core/surface equilibria. We describe femtosecond pump/probe spectroscopic experiments which reveal the signatures of carrier trapping at the surface. We also describe temperature dependent steady-state photoluminescence experiments which reveal new aspects of the surface. This work suggest that the surface emission is largely driven by homogeneous broadening via phonon progressions. The implications are that the surface electronic state bears similarity to the quantized excitonic core of the nanocrystal.

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	2 4 6 8 10 12 14 16
Journal of Physical Chemistry C	Journal of Physical Chemistry C, 15, 20.27% Journal of Physical Chemistry C 15 publications, 20.27%
Journal of Physical Chemistry Letters	Journal of Physical Chemistry Letters, 12, 16.22% Journal of Physical Chemistry Letters 12 publications, 16.22%
ACS Nano	ACS Nano, 7, 9.46% ACS Nano 7 publications, 9.46%
Physical Chemistry Chemical Physics	Physical Chemistry Chemical Physics, 4, 5.41% Physical Chemistry Chemical Physics 4 publications, 5.41%
Physica E: Low-Dimensional Systems and Nanostructures	Physica E: Low-Dimensional Systems and Nanostructures, 2, 2.7% Physica E: Low-Dimensional Systems and Nanostructures 2 publications, 2.7%
Journal of Colloid and Interface Science	Journal of Colloid and Interface Science, 2, 2.7% Journal of Colloid and Interface Science 2 publications, 2.7%
Journal of the American Chemical Society	Journal of the American Chemical Society, 2, 2.7% Journal of the American Chemical Society 2 publications, 2.7%
Chemistry of Materials	Chemistry of Materials, 2, 2.7% Chemistry of Materials 2 publications, 2.7%
ACS Photonics	ACS Photonics, 2, 2.7% ACS Photonics 2 publications, 2.7%
Nano Letters	Nano Letters, 2, 2.7% Nano Letters 2 publications, 2.7%
Chemical Science	Chemical Science, 2, 2.7% Chemical Science 2 publications, 2.7%
Applied Physics Letters	Applied Physics Letters, 1, 1.35% Applied Physics Letters 1 publication, 1.35%
Journal of Chemical Physics	Journal of Chemical Physics, 1, 1.35% Journal of Chemical Physics 1 publication, 1.35%
Nature	Nature, 1, 1.35% Nature 1 publication, 1.35%
Journal of Nanoparticle Research	Journal of Nanoparticle Research, 1, 1.35% Journal of Nanoparticle Research 1 publication, 1.35%
Communications Chemistry	Communications Chemistry, 1, 1.35% Communications Chemistry 1 publication, 1.35%
Journal of Luminescence	Journal of Luminescence, 1, 1.35% Journal of Luminescence 1 publication, 1.35%
Chemical Physics	Chemical Physics, 1, 1.35% Chemical Physics 1 publication, 1.35%
Advanced Materials	Advanced Materials, 1, 1.35% Advanced Materials 1 publication, 1.35%
ChemPhysChem	ChemPhysChem, 1, 1.35% ChemPhysChem 1 publication, 1.35%
ChemNanoMat	ChemNanoMat, 1, 1.35% ChemNanoMat 1 publication, 1.35%
Advanced Optical Materials	Advanced Optical Materials, 1, 1.35% Advanced Optical Materials 1 publication, 1.35%
ACS applied materials & interfaces	ACS applied materials & interfaces, 1, 1.35% ACS applied materials & interfaces 1 publication, 1.35%
Journal of Physical Chemistry A	Journal of Physical Chemistry A, 1, 1.35% Journal of Physical Chemistry A 1 publication, 1.35%
ACS Energy Letters	ACS Energy Letters, 1, 1.35% ACS Energy Letters 1 publication, 1.35%
Nanoscale	Nanoscale, 1, 1.35% Nanoscale 1 publication, 1.35%
RSC Advances	RSC Advances, 1, 1.35% RSC Advances 1 publication, 1.35%
Zeitschrift fur Physikalische Chemie	Zeitschrift fur Physikalische Chemie, 1, 1.35% Zeitschrift fur Physikalische Chemie 1 publication, 1.35%
Interface Science and Technology	Interface Science and Technology, 1, 1.35% Interface Science and Technology 1 publication, 1.35%
	2 4 6 8 10 12 14 16

Citations by publishers

	5 10 15 20 25 30 35 40 45
American Chemical Society (ACS)	American Chemical Society (ACS), 45, 60.81% American Chemical Society (ACS) 45 publications, 60.81%
Elsevier	Elsevier, 8, 10.81% Elsevier 8 publications, 10.81%
Royal Society of Chemistry (RSC)	Royal Society of Chemistry (RSC), 8, 10.81% Royal Society of Chemistry (RSC) 8 publications, 10.81%
Wiley	Wiley, 4, 5.41% Wiley 4 publications, 5.41%
Springer Nature	Springer Nature, 3, 4.05% Springer Nature 3 publications, 4.05%
American Institute of Physics (AIP)	American Institute of Physics (AIP), 2, 2.7% American Institute of Physics (AIP) 2 publications, 2.7%
Walter de Gruyter	Walter de Gruyter, 1, 1.35% Walter de Gruyter 1 publication, 1.35%
Autonomous Non-profit Organization Editorial Board of the journal Uspekhi Khimii	Autonomous Non-profit Organization Editorial Board of the journal Uspekhi Khimii, 1, 1.35% Autonomous Non-profit Organization Editorial Board of the journal Uspekhi Khimii 1 publication, 1.35%
	5 10 15 20 25 30 35 40 45

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Kambhampati P. On the kinetics and thermodynamics of excitons at the surface of semiconductor nanocrystals: Are there surface excitons? // Chemical Physics. 2015. Vol. 446. pp. 92-107.

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Kambhampati P. On the kinetics and thermodynamics of excitons at the surface of semiconductor nanocrystals: Are there surface excitons? // Chemical Physics. 2015. Vol. 446. pp. 92-107.

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