Förster energy transfer from blue-emitting polymers to colloidal CdSe/ZnS core shell quantum dots

Anni, M.; Manna, L.; Cingolani, R.; Valerini, D.; Cretí, A.; Lomascolo, M.
November 2004
Applied Physics Letters;11/1/2004, Vol. 85 Issue 18, p4169
Academic Journal
We have studied the interactions in the solid phase between a blue-light-emitting organic conjugated polymer {poly[(9,9-dihexylfluorenyl-2,7-diyl)-alt-co-(9,ethyl-3,6-carbazole)]} and colloidal CdSe/ZnS core shell quantum dots. We demonstrate by time resolved photoluminescence measurements that efficient Förster energy transfer takes place from the polymer acting as the donor and the CdSe/ZnS dots, acting as the acceptors. A Förster radius of about 80±15 Å is extracted from the analysis of the relaxation dynamics based on the solution of the donor-acceptor coupled rate equations. This value is in good agreement with the value extracted from the steady state spectra and indicates that efficient energy tranfer from a polymeric host to a nanocrystal guest can occur. Our results are relevant to the application of hybrid organic/inorganic systems to light-emitting devices.


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