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Charge carrier generation in a conjugated polymer studied via ultrafast pump-push-probe experiments

Gadermaier, Christoph and Lanzani, Guglielmo and Cerullo, Giulio and Zavelani Rossi, Margherita and De Silvestri, Sandro and Leising, Günther (2001) Charge carrier generation in a conjugated polymer studied via ultrafast pump-push-probe experiments. In: Quantum Electronics and Laser Science Conference, 2001: QELS '01: Technical Digest: Summaries of Papers, May 6-11, 2001, Baltimore (MD), USA. Piscataway, IEEE. p. 179. ISBN 1-55752-663-X. Conference or Workshop Item.

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DOI: 10.1109/QELS.2001.962035

Abstract

Conjugated polymers find rapidly growing application in electroluminescent displays and are extensively studied for use in photovoltaics and laser diodes. For a wide range of conjugated materials ultrafast pump-probe experiments have revealed the excited state dynamics of singlet and triplet excitons as well as positively and negatively charged polarons. Charge carriers play a key role in all the above mentioned applications. However, there is yet no clear picture of the mechanisms which lead to their generation. Photocurrent excitation cross-correlation measurement on methyl-substituted ladder-type poly(para)phenyl (m-LPPP), a prototypical conjugated polymer with very appealing properties for the above mentioned applications, have suggested that charge carrier generation occurs preferentially from higher lying states during energy migration. Our approach to examining this mechanism consists of an innovative modification of the ultrafast time-resolved pump-probe technique.

Item Type:Conference or Workshop Item (Paper)
ID Code:3594
Status:Published
Uncontrolled Keywords:Carrier mobility, high-speed optical techniques, optical correlation, optical polymers, optical pumping, photoconducting materials, photovoltaic effects, polarons, time resolved spectra
Subjects:Area 02 - Scienze fisiche > FIS/01 Fisica sperimentale
Divisions:001 Università di Sassari > 03 Istituti > Matematica e fisica
Publisher:IEEE
Copyright Holders:© 2001 IEEE
ISBN:1-55752-663-X
Publisher Policy:Depositato in conformità con la politica di copyright dell'Editore
Deposited On:05 Mar 2010 17:44

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