Dynamics of photoexcitations in highly fluorescent organic guest-host-systems

A guest-host-system based on a few hundred ppm of the red emitting poly(perylene-co-diethynylbenzene) (PPDB) in blue emitting ladder-type poly( para-phenylene) (LPPP) can be used to build efficient white light emitting devices. Upon photoexcitation of the films a very efficient excitation energy tra...

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Bibliographic Details
Published in:Optical materials 1998, Vol.9 (1), p.494-497
Main Authors: List, E.J.W., Graupner, W., Wohlgenannt, M., Leising, G., Partee, J., Shinar, J., Schlichting, P., Rohr, U., Geerts, Y., Scherf, U., Müllen, K.
Format: Article
Language:English
Subjects:
Applied sciences
Electrical, magnetic and optical properties
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
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Summary:A guest-host-system based on a few hundred ppm of the red emitting poly(perylene-co-diethynylbenzene) (PPDB) in blue emitting ladder-type poly( para-phenylene) (LPPP) can be used to build efficient white light emitting devices. Upon photoexcitation of the films a very efficient excitation energy transfer (EET), involving the diffusion of an electron hole pair from the higher energy gap LPPP to the lower-gap PPDB, is observed. The results of optically detected magnetic resonance and photoinduced absorption of these blends, all of which are sensitive to charged spin 1 2 states and spin 1 triplet excitons, are described and discussed.
ISSN:0925-3467
1873-1252
DOI:10.1016/S0925-3467(97)00136-5