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Energy-Level Alignm...
Energy-Level Alignment at Metal-Organic and Organic-Organic Interfaces in Bulk-Heterojunction Solar Cells
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- Sehati, Parisa (author)
- Linköpings universitet,Ytors Fysik och Kemi,Tekniska högskolan
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- Braun, Slawomir (author)
- Linköpings universitet,Ytors Fysik och Kemi,Tekniska högskolan
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- Lindell, Linda (author)
- Linköpings universitet,Ytors Fysik och Kemi,Tekniska högskolan
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- Liu, Xianjie (author)
- Linköpings universitet,Ytors Fysik och Kemi,Tekniska högskolan
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- Andersson, Lars Mattias (author)
- Linköpings universitet,Ytors Fysik och Kemi,Tekniska högskolan
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- Fahlman, Mats (author)
- Linköpings universitet,Ytors Fysik och Kemi,Tekniska högskolan
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(creator_code:org_t)
- Institute of Electrical and Electronics Engineers (IEEE), 2010
- 2010
- English.
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In: IEEE Journal of Selected Topics in Quantum Electronics. - : Institute of Electrical and Electronics Engineers (IEEE). - 1077-260X .- 1558-4542. ; 16:6, s. 1718-1724
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https://liu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Ultraviolet photoelectron spectroscopy measurements in combination with the integer charge transfer (ICT) model is used to obtain the energy-level alignment diagrams for two common types of bulk-heterojunction solar cell devices based on poly(3-hexylthiophene) or poly(2-methoxy-5-(3,7 -dimethyloctyloxy)- 1,4-phenylene vinylene) as the donor polymer and (6,6)phenyl- C61-butric-acid as the acceptor molecule. A ground-state interface dipole at the donor/acceptor heterojunction is present for both systems, but the origin of the interface dipole differs, quadrupole-induced in the case of poly(2-methoxy-5-(3,7-dimethyl-octyloxy)-1,4-phenylene vinylene), and ICT state based for poly(3-hexylthiophene). The presence of bound electron-hole charge carriers (CT states) and/or interface dipoles are expected to enhance exciton dissociation into free charge carriers, thus reducing the probability that charges become trapped by Coulomb forces at the interface followed by recombination.
Keyword
- Interfaces
- organic electronics
- photoelectron
- spectroscopy
- solar cells
- TECHNOLOGY
- TEKNIKVETENSKAP
Publication and Content Type
- ref (subject category)
- art (subject category)
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