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Ultrafast Excitation Energy Transfer in a Blend of Light-Emitting Conjugated Polymers

Synthetic Metals, ISSN: 0379-6779, Vol: 101, Issue: 1, Page: 306-307
1999
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We applied femtosecond pump-probe spectroscopy to a guest-host system of conjugated polymers, the blue-emitting poly( para phenylene) (m-LPPP) and the red-emitting poly(perylene-co-diethynylbenzene) (PPDB). Excitation energy transfer between m-LPPP and PPDB, monitored by the formation of the PPDB photobleaching band at 2.15 eV, takes place on a picosecond time scale. The nonexponential kinetics of the excitation energy transfer and its dependence on acceptor (PPDB) concentration provide clear evidence for a Förster-type energy transfer.

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