Exciton self-trapping in MEH-PPV films studied by ultrafast emission depolarization

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Abstract

Depolarization of the transient absorption with a time constant of < 120 fs is observed in poly[2-(2'ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene] (MEH-PPV) film. It is too fast to be explained by incoherent hopping. We attribute it to dynamic localization (self-trapping) of the initially delocalized excitons driven by structural relaxation of excited segments. Implications for charge carrier photogeneration are briefly disscussed. (c) 2006 WILEYNCH Veriag GmbH & Co. KGaA, Weinheim.

Original languageEnglish
Title of host publicationPhysica Status Solidi C - Current Topics in Solid State Physics, Vol 3, No 2
EditorsHB Brom
Place of PublicationWEINHEIM
PublisherWiley-VCH, Weinheim
Pages263-266
Number of pages4
DOIs
Publication statusPublished - 2006
Event11th International Conference on Transport in Interacting and Disordered Systems - Egmond aan Zee
Duration: 21 Aug 200526 Aug 2005

Conference

Conference11th International Conference on Transport in Interacting and Disordered Systems
CityEgmond aan Zee
Period21/08/0526/08/05

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