Photo-induced charge transfer in heterodimerscomposed of CdSe/ZnS semiconductor quantum dot and fullerene was probed by singlemolecule fluorescence spectroscopy by using quntum dots of various colors and interparticlelinkers with varying distance. Quenching of single quantum dot'sphotoluminescence by charge transfer was observed only in the �on� state and itmanifests both as a reduced fluorescence intensity and as a shortening in fluorescencelifetime. As a result, the charge transfer changes the on/off dynamics (blinking)of the fluorescence intensity of individual quantum dots. The results obtainedin these studies will be discussed in view of the use of such heterodimers insolar energy applications.

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

240th National Meeting (2010)

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