Single-particle studies of band alignment effects on electron transfer dynamics from semiconductor hetero-nanostructures to single-walled carbon nanotubes

Chi Tsu Yuan; Yong Gang Wang; Kuo Yen Huang; Ting Yu Chen; Pyng Yu; Jau Tang; Amit Sitt; Uri Banin; Oded Millo

doi:10.1021/nn2036957

Single-particle studies of band alignment effects on electron transfer dynamics from semiconductor hetero-nanostructures to single-walled carbon nanotubes

Chi Tsu Yuan, Yong Gang Wang, Kuo Yen Huang, Ting Yu Chen, Pyng Yu, Jau Tang^*, Amit Sitt, Uri Banin, Oded Millo

^*Corresponding author for this work

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

24 Scopus citations

Abstract

Figure Persented: We utilize single-molecule spectroscopy combined with time-correlated single-photon counting to probe the electron transfer (ET) rates from various types of semiconductor hetero-nanocrystals, having either type-I or type-II band alignment, to single-walled carbon nanotubes. A significantly larger ET rate was observed for type-II ZnSe/CdS dot-in-rod nanostructures as compared to type-I spherical CdSe/ZnS core/shell quantum dots and to CdSe/CdS dot-in-rod structures. Furthermore, such rapid ET dynamics can compete with both Auger and radiative recombination processes, with significance for effective photovoltaic operation.

Original language	English
Pages (from-to)	176-182
Number of pages	7
Journal	ACS Nano
Volume	6
Issue number	1
DOIs	https://doi.org/10.1021/nn2036957
State	Published - 24 Jan 2012

Keywords

carbon nanotubes
colloidal nanocrystals
single-molecule spectroscopy

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/nn2036957

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title = "Single-particle studies of band alignment effects on electron transfer dynamics from semiconductor hetero-nanostructures to single-walled carbon nanotubes",

abstract = "Figure Persented: We utilize single-molecule spectroscopy combined with time-correlated single-photon counting to probe the electron transfer (ET) rates from various types of semiconductor hetero-nanocrystals, having either type-I or type-II band alignment, to single-walled carbon nanotubes. A significantly larger ET rate was observed for type-II ZnSe/CdS dot-in-rod nanostructures as compared to type-I spherical CdSe/ZnS core/shell quantum dots and to CdSe/CdS dot-in-rod structures. Furthermore, such rapid ET dynamics can compete with both Auger and radiative recombination processes, with significance for effective photovoltaic operation.",

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author = "Yuan, {Chi Tsu} and Wang, {Yong Gang} and Huang, {Kuo Yen} and Chen, {Ting Yu} and Pyng Yu and Jau Tang and Amit Sitt and Uri Banin and Oded Millo",

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doi = "10.1021/nn2036957",

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T1 - Single-particle studies of band alignment effects on electron transfer dynamics from semiconductor hetero-nanostructures to single-walled carbon nanotubes

AU - Yuan, Chi Tsu

AU - Wang, Yong Gang

AU - Huang, Kuo Yen

AU - Chen, Ting Yu

AU - Yu, Pyng

AU - Tang, Jau

AU - Sitt, Amit

AU - Banin, Uri

AU - Millo, Oded

PY - 2012/1/24

Y1 - 2012/1/24

N2 - Figure Persented: We utilize single-molecule spectroscopy combined with time-correlated single-photon counting to probe the electron transfer (ET) rates from various types of semiconductor hetero-nanocrystals, having either type-I or type-II band alignment, to single-walled carbon nanotubes. A significantly larger ET rate was observed for type-II ZnSe/CdS dot-in-rod nanostructures as compared to type-I spherical CdSe/ZnS core/shell quantum dots and to CdSe/CdS dot-in-rod structures. Furthermore, such rapid ET dynamics can compete with both Auger and radiative recombination processes, with significance for effective photovoltaic operation.

AB - Figure Persented: We utilize single-molecule spectroscopy combined with time-correlated single-photon counting to probe the electron transfer (ET) rates from various types of semiconductor hetero-nanocrystals, having either type-I or type-II band alignment, to single-walled carbon nanotubes. A significantly larger ET rate was observed for type-II ZnSe/CdS dot-in-rod nanostructures as compared to type-I spherical CdSe/ZnS core/shell quantum dots and to CdSe/CdS dot-in-rod structures. Furthermore, such rapid ET dynamics can compete with both Auger and radiative recombination processes, with significance for effective photovoltaic operation.

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KW - colloidal nanocrystals

KW - single-molecule spectroscopy

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Single-particle studies of band alignment effects on electron transfer dynamics from semiconductor hetero-nanostructures to single-walled carbon nanotubes

Abstract

Keywords

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