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Fermi-level pinning...
Fermi-level pinning at conjugated polymer interfaces
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- Tengstedt, Carl, 1974- (author)
- Linköpings universitet,Institutionen för teknik och naturvetenskap,Tekniska högskolan
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- Osikowicz, Wojciech, 1974- (author)
- Linköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska högskolan
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- Salaneck, William R, 1941- (author)
- Linköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska högskolan
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- Parker, I.D. (author)
- Dupont Displays, Santa Barbara, California
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- Hsu, C-H. (author)
- Dupont Displays, E.I. DuPont de Nemours and Company, Wilmington, Delaware
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- Fahlman, Mats, 1967- (author)
- Linköpings universitet,Institutionen för teknik och naturvetenskap,Tekniska högskolan
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(creator_code:org_t)
- AIP Publishing, 2006
- 2006
- English.
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In: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 88:5, s. 53502-
- Related links:
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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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- Photoelectron spectroscopy has been used to map out energy level alignment of conjugated polymers at various organic-organic and hybrid interfaces. Specifically, we have investigated the hole-injection interface between the substrate and light-emitting polymer. Two different alignment regimes have been observed: (i) Vacuum-level alignment, which corresponds to the lack of vacuum-level offsets (Schottky–Mott limit) and (ii) Fermi-level pinning, where the substrate Fermi level and the positive polaronic level of the polymer align. The observation is rationalized in terms of spontaneous charge transfer whenever the substrate Fermi level exceeds the positive polaron/bipolaron formation energy per particle. The charge transfer leads to the formation of an interfacial dipole, as large as 2.1 eV.
Keyword
- TECHNOLOGY
- TEKNIKVETENSKAP
Publication and Content Type
- ref (subject category)
- art (subject category)
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