| Pressure-induced delocalization of photoexcited states in a semiconducting polymer. | |
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MedLine Citation:
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PMID: 21231181 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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We present broadband transient absorption spectroscopy on the fluorescent copolymer poly(9,9-dioctylfluorene-co-benzothiadiazole) under hydrostatic pressure of up to 75 kbar. We observe a strong reduction of the stimulated emission intensity under pressure, coupled with slower decay kinetics and reduced fluorescence intensity. These observations indicate increased delocalization of photogenerated singlet excitons, facilitated by an increased dielectric constant at high pressure. Spin triplet excitons, generated via an iridium complex-F8BT oligomer, show reduced lifetimes under pressure. |
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Authors:
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Sebastian Albert-Seifried; Justin M Hodgkiss; Frédéric Laquai; Hugo A Bronstein; Charlotte K Williams; Richard H Friend |
Publication Detail:
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Type: Journal Article Date: 2010-11-02 |
Journal Detail:
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Title: Physical review letters Volume: 105 ISSN: 1079-7114 ISO Abbreviation: Phys. Rev. Lett. Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2011-01-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401141 Medline TA: Phys Rev Lett Country: United States |
Other Details:
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Languages: eng Pagination: 195501 Citation Subset: - |
Affiliation:
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Cavendish Laboratory, Department of Physics, University of Cambridge, CB3 0HE, United Kingdom. sa468@cam.ac.uk |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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