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Probing the morphol...
Probing the morphology and energy landscape of blends of conjugated polymers with sub-10 nm resolution.
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- Westenhoff, Sebastian, 1978 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för kemi,Department of Chemistry
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Howard, Ian A (author)
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Friend, Richard H (author)
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(creator_code:org_t)
- 2008
- 2008
- English.
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In: Physical review letters. - 0031-9007. ; 101:1
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Abstract
Subject headings
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- We have investigated the charge generation dynamics in intimately mixed blends of polyfluorene copolymers optimized for photocurrent generation. Using femtosecond transient absorption spectroscopy, we find that the charge generation time is limited by exciton diffusion to the interface. Combined with the kinetics of exciton energy migration, the data reveal the blend morphology on a length scale of sub-10 nm. Furthermore, we demonstrate that excitons are guided efficiently to the interface, which is consistent with an accumulation of low energy sites at the heterojunction.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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