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Charge equilibration and potential steps in organic semiconductor multilayers
University of Twente, Netherlands.
University of Twente, Netherlands.
University of Twente, Netherlands.
University of Twente, Netherlands .
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2012 (English)In: Organic electronics, ISSN 1566-1199, E-ISSN 1878-5530, Vol. 13, no 10, 1793-1801 p.Article in journal (Refereed) Published
Abstract [en]

Substantial potential steps similar to 0.5 eV are frequently observed in organic multilayers of donor and acceptor molecules. Often such potential steps depend on the order in which the individual layers are deposited, or on which substrate they are deposited. In this paper we outline a model for these potential steps, based upon integer charge transfer between donors and acceptors, charge equilibration across the multilayer, and simple electrostatics. Each donor, acceptor, or substrate material is characterized by a pinning level, and the potential profile can be deduced from the sequential order of the layers, and the differences between their pinning levels. For particular orderings we predict that intrinsic potential differences lead to electric fields across individual layers, which may falsely be interpreted as band bending.

Place, publisher, year, edition, pages
Elsevier , 2012. Vol. 13, no 10, 1793-1801 p.
Keyword [en]
Organic semiconductor, Donor acceptor, Potential step, Multilayer
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-85631DOI: 10.1016/j.orgel.2012.05.041ISI: 000309591200005OAI: oai:DiVA.org:liu-85631DiVA: diva2:572055
Note

Funding Agencies|European project MINOTOR|FP7-NMP-228424|STEM, the Swedish Energy Agency||

Available from: 2012-11-26 Created: 2012-11-26 Last updated: 2017-12-07

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Fahlman, Mats

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
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  • sv-SE
  • Other locale
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Output format
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