Probing dynamics of photoinduced charge transfer in heterodimers composed of CdSe/ZnS quantum dots and fullerene derivatives by single molecule spectroscopy

Mircea Cotlet, Zhihua Xu

Research output: Contribution to journalArticle

Abstract

Photo-induced charge transfer in heterodimers composed of CdSe/ZnS semiconductor quantum dot and fullerene was probed by single molecule fluorescence spectroscopy by using quntum dots of various colors and interparticle linkers with varying distance. Quenching of single quantum dot's photoluminescence by charge transfer was observed only in the "on" state and it manifests both as a reduced fluorescence intensity and as a shortening in fluorescence lifetime. As a result, the charge transfer changes the on/off dynamics (blinking) of the fluorescence intensity of individual quantum dots. The results obtained in these studies will be discussed in view of the use of such heterodimers in solar energy applications.

Original languageEnglish (US)
JournalACS National Meeting Book of Abstracts
StatePublished - Dec 1 2010

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Fullerenes
Semiconductor quantum dots
Charge transfer
Fluorescence
Spectroscopy
Derivatives
Molecules
Fluorescence spectroscopy
Solar energy
Quenching
Photoluminescence
Color

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title = "Probing dynamics of photoinduced charge transfer in heterodimers composed of CdSe/ZnS quantum dots and fullerene derivatives by single molecule spectroscopy",
abstract = "Photo-induced charge transfer in heterodimers composed of CdSe/ZnS semiconductor quantum dot and fullerene was probed by single molecule fluorescence spectroscopy by using quntum dots of various colors and interparticle linkers with varying distance. Quenching of single quantum dot's photoluminescence by charge transfer was observed only in the {"}on{"} state and it manifests both as a reduced fluorescence intensity and as a shortening in fluorescence lifetime. As a result, the charge transfer changes the on/off dynamics (blinking) of the fluorescence intensity of individual quantum dots. The results obtained in these studies will be discussed in view of the use of such heterodimers in solar energy applications.",
author = "Mircea Cotlet and Zhihua Xu",
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language = "English (US)",
journal = "ACS National Meeting Book of Abstracts",
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T1 - Probing dynamics of photoinduced charge transfer in heterodimers composed of CdSe/ZnS quantum dots and fullerene derivatives by single molecule spectroscopy

AU - Cotlet, Mircea

AU - Xu, Zhihua

PY - 2010/12/1

Y1 - 2010/12/1

N2 - Photo-induced charge transfer in heterodimers composed of CdSe/ZnS semiconductor quantum dot and fullerene was probed by single molecule fluorescence spectroscopy by using quntum dots of various colors and interparticle linkers with varying distance. Quenching of single quantum dot's photoluminescence by charge transfer was observed only in the "on" state and it manifests both as a reduced fluorescence intensity and as a shortening in fluorescence lifetime. As a result, the charge transfer changes the on/off dynamics (blinking) of the fluorescence intensity of individual quantum dots. The results obtained in these studies will be discussed in view of the use of such heterodimers in solar energy applications.

AB - Photo-induced charge transfer in heterodimers composed of CdSe/ZnS semiconductor quantum dot and fullerene was probed by single molecule fluorescence spectroscopy by using quntum dots of various colors and interparticle linkers with varying distance. Quenching of single quantum dot's photoluminescence by charge transfer was observed only in the "on" state and it manifests both as a reduced fluorescence intensity and as a shortening in fluorescence lifetime. As a result, the charge transfer changes the on/off dynamics (blinking) of the fluorescence intensity of individual quantum dots. The results obtained in these studies will be discussed in view of the use of such heterodimers in solar energy applications.

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