Electron transfer in quantum-dot-sensitized ZnO nanowires: Ultrafast time-resolved absorption and terahertz study

Karel Žídek; Kaibo Zheng; Carlito S. Ponseca; Maria E. Messing; L. Reine Wallenberg; Pavel Chábera; Mohamed Abdellah; Villy Sundström; Tõnu Pullerits

doi:10.1021/ja3029679

Electron transfer in quantum-dot-sensitized ZnO nanowires: Ultrafast time-resolved absorption and terahertz study

Karel Žídek, Kaibo Zheng, Carlito S. Ponseca, Maria E. Messing, L. Reine Wallenberg, Pavel Chábera, Mohamed Abdellah, Villy Sundström, Tõnu Pullerits

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

113 Citations (Scopus)

Abstract

Photoinduced electron injection dynamics from CdSe quantum dots to ZnO nanowires is studied by transient absorption and time-resolved terahertz spectroscopy measurements. Ultrafast electron transfer from the CdSe quantum dots to ZnO is proven to be efficient already on a picoseconds time scale (τ = 3-12 ps). The measured kinetics was found to have a two-component character, whose origin is discussed in detail. The obtained results suggest that electrons are injected into ZnO via an intermediate charge transfer state.

Original language	English
Pages (from-to)	12110-12117
Number of pages	8
Journal	Journal of the American Chemical Society
Volume	134
Issue number	29
DOIs	https://doi.org/10.1021/ja3029679
Publication status	Published - Jul 25 2012
Externally published	Yes

ASJC Scopus subject areas

Catalysis
General Chemistry
Biochemistry
Colloid and Surface Chemistry

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title = "Electron transfer in quantum-dot-sensitized ZnO nanowires: Ultrafast time-resolved absorption and terahertz study",

abstract = "Photoinduced electron injection dynamics from CdSe quantum dots to ZnO nanowires is studied by transient absorption and time-resolved terahertz spectroscopy measurements. Ultrafast electron transfer from the CdSe quantum dots to ZnO is proven to be efficient already on a picoseconds time scale (τ = 3-12 ps). The measured kinetics was found to have a two-component character, whose origin is discussed in detail. The obtained results suggest that electrons are injected into ZnO via an intermediate charge transfer state.",

author = "Karel {\v Z}{\'i}dek and Kaibo Zheng and Ponseca, {Carlito S.} and Messing, {Maria E.} and Wallenberg, {L. Reine} and Pavel Ch{\'a}bera and Mohamed Abdellah and Villy Sundstr{\"o}m and T{\~o}nu Pullerits",

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doi = "10.1021/ja3029679",

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T1 - Electron transfer in quantum-dot-sensitized ZnO nanowires

T2 - Ultrafast time-resolved absorption and terahertz study

AU - Žídek, Karel

AU - Zheng, Kaibo

AU - Ponseca, Carlito S.

AU - Messing, Maria E.

AU - Wallenberg, L. Reine

AU - Chábera, Pavel

AU - Abdellah, Mohamed

AU - Sundström, Villy

AU - Pullerits, Tõnu

PY - 2012/7/25

Y1 - 2012/7/25

N2 - Photoinduced electron injection dynamics from CdSe quantum dots to ZnO nanowires is studied by transient absorption and time-resolved terahertz spectroscopy measurements. Ultrafast electron transfer from the CdSe quantum dots to ZnO is proven to be efficient already on a picoseconds time scale (τ = 3-12 ps). The measured kinetics was found to have a two-component character, whose origin is discussed in detail. The obtained results suggest that electrons are injected into ZnO via an intermediate charge transfer state.

AB - Photoinduced electron injection dynamics from CdSe quantum dots to ZnO nanowires is studied by transient absorption and time-resolved terahertz spectroscopy measurements. Ultrafast electron transfer from the CdSe quantum dots to ZnO is proven to be efficient already on a picoseconds time scale (τ = 3-12 ps). The measured kinetics was found to have a two-component character, whose origin is discussed in detail. The obtained results suggest that electrons are injected into ZnO via an intermediate charge transfer state.

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Electron transfer in quantum-dot-sensitized ZnO nanowires: Ultrafast time-resolved absorption and terahertz study

Abstract

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