Indirect exciton formation due to inhibited carrier thermalization in single CdSe/CdS nanocrystals

Eyal Shafran; Nicholas J. Borys; Jing Huang; Dmitri V. Talapin; John M. Lupton

doi:10.1021/jz400070g

Indirect exciton formation due to inhibited carrier thermalization in single CdSe/CdS nanocrystals

Eyal Shafran, Nicholas J. Borys, Jing Huang, Dmitri V. Talapin, John M. Lupton

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

19 Scopus citations

Abstract

Temperature-dependent single-particle spectroscopy is used to study interfacial energy transfer in model light-harvesting CdSe/CdS core-shell tetrapod nanocrystals. Using alternating excitation energies, we identify two thermalized exciton states in single nanoparticles that are attributed to a strain-induced interfacial barrier. At cryogenic temperatures, emission from both states exemplifies the effects of intraparticle disorder and enables their simultaneous characterization, revealing that the two states are distinct in regards to emission polarization, spectral diffusion, and blinking.

Original language	English
Pages (from-to)	691-697
Number of pages	7
Journal	Journal of Physical Chemistry Letters
Volume	4
Issue number	4
DOIs	https://doi.org/10.1021/jz400070g
State	Published - 21 Feb 2013
Externally published	Yes

Keywords

CdSe/CdS nanocrystals
indirect excitons
nanocrystal tetrapods
quantum dots
single-particle microscopy
temperature dependence

ASJC Scopus subject areas

General Materials Science
Physical and Theoretical Chemistry

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10.1021/jz400070g

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title = "Indirect exciton formation due to inhibited carrier thermalization in single CdSe/CdS nanocrystals",

abstract = "Temperature-dependent single-particle spectroscopy is used to study interfacial energy transfer in model light-harvesting CdSe/CdS core-shell tetrapod nanocrystals. Using alternating excitation energies, we identify two thermalized exciton states in single nanoparticles that are attributed to a strain-induced interfacial barrier. At cryogenic temperatures, emission from both states exemplifies the effects of intraparticle disorder and enables their simultaneous characterization, revealing that the two states are distinct in regards to emission polarization, spectral diffusion, and blinking.",

keywords = "CdSe/CdS nanocrystals, indirect excitons, nanocrystal tetrapods, quantum dots, single-particle microscopy, temperature dependence",

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T1 - Indirect exciton formation due to inhibited carrier thermalization in single CdSe/CdS nanocrystals

AU - Shafran, Eyal

AU - Borys, Nicholas J.

AU - Huang, Jing

AU - Talapin, Dmitri V.

AU - Lupton, John M.

PY - 2013/2/21

Y1 - 2013/2/21

N2 - Temperature-dependent single-particle spectroscopy is used to study interfacial energy transfer in model light-harvesting CdSe/CdS core-shell tetrapod nanocrystals. Using alternating excitation energies, we identify two thermalized exciton states in single nanoparticles that are attributed to a strain-induced interfacial barrier. At cryogenic temperatures, emission from both states exemplifies the effects of intraparticle disorder and enables their simultaneous characterization, revealing that the two states are distinct in regards to emission polarization, spectral diffusion, and blinking.

AB - Temperature-dependent single-particle spectroscopy is used to study interfacial energy transfer in model light-harvesting CdSe/CdS core-shell tetrapod nanocrystals. Using alternating excitation energies, we identify two thermalized exciton states in single nanoparticles that are attributed to a strain-induced interfacial barrier. At cryogenic temperatures, emission from both states exemplifies the effects of intraparticle disorder and enables their simultaneous characterization, revealing that the two states are distinct in regards to emission polarization, spectral diffusion, and blinking.

KW - CdSe/CdS nanocrystals

KW - indirect excitons

KW - nanocrystal tetrapods

KW - quantum dots

KW - single-particle microscopy

KW - temperature dependence

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JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 4

ER -

Indirect exciton formation due to inhibited carrier thermalization in single CdSe/CdS nanocrystals

Abstract

Keywords

ASJC Scopus subject areas

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