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Fluorescence resonance energy transfer in a non-conjugated system of CdSe quantum dots/zinc-phthalocyanine |
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| Authors: | Marcin Nyk Krystyna Palewska Leszek Kepinski Kazimiera A. Wilk Wieslaw Strek Marek Samoc |
| Affiliation: | 1. Institute of Physical and Theoretical Chemistry, Department of Chemistry, Wroc?aw University of Technology, Wybrze?e Wyspiańskiego 27, 50370 Wroclaw, Poland;2. Division of Organic Technology, Department of Chemistry, Wroc?aw University of Technology, Wybrze?e Wyspiańskiego 27, 50370 Wroclaw, Poland;3. Institute for Low Temperature and Structure Research, Polish Academy of Sciences, 50422 Wroclaw, Poland |
| Abstract: | Energy transfer between CdSe quantum dots (QDs) as donors and Zn phthalocyanine (Zn-Pc) molecules as acceptors was studied using steady-state photoluminescence and time-correlated single photon counting techniques. With the latter technique it is evaluated that the lifetime of Zn-Pc emission increases from 4 ns to ca. 30 ns on 460 nm excitation in the presence of the QDs. The concomitant decrease in the lifetime of the QDs emission (from 23.5 to 18.4 ns) indicates that the excitation of Zn-Pc occurs not only through reabsorption but also through fluorescence resonance energy transfer. |
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