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Electrostatic potential and double layer force in a semiconductor-electrolyte-semiconductor heterojunction
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
2006 (English)In: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, ISSN 1063-651X, E-ISSN 1095-3787, Vol. 74, no 6, 061606- p.Article in journal (Refereed) Published
Abstract [en]

This paper reports a theoretical study of the electrostatic potential within a so-called pen-heterojunction made up of two semi-infinite, doped semiconductor media separated by an electrolyte region. An external potential is then applied across the entire system. Both the electrostatic potentials and double layer surface forces are studied as functions of the usual double layer system properties, semiconductor properties such as doping concentrations of acceptor and donator atoms, as well as applied potential. We find that both attractive and repulsive forces are possible depending on the surface charges on the electrolyte-semiconductor interfaces, and that these forces can be significantly modified by the applied potential and by the doping levels in the semiconductors.

Place, publisher, year, edition, pages
2006. Vol. 74, no 6, 061606- p.
Keyword [en]
electrolytes; semiconductor heterojunctions; semiconductor doping; doping profiles; interface phenomena
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-15727DOI: 10.1103/PhysRevE.74.061606OAI: oai:DiVA.org:liu-15727DiVA: diva2:127135
Available from: 2008-12-04 Created: 2008-12-01 Last updated: 2017-12-14Bibliographically approved
In thesis
1. Electrolyte: Semiconductor Combinations for Organic Electronic Devices
Open this publication in new window or tab >>Electrolyte: Semiconductor Combinations for Organic Electronic Devices
2009 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The discovery of semi-conducting organic materials has opened new possibilities for electronic devices and systems because of their solution processibility, lightweight and flexibility compared to inorganic semiconductors. The combination of semiconductors with electrolytes, and more especially organic semiconductors and solid electrolytes has attracted the attention of researchers because of the multiple phenomena originating from the simultaneous motion of electrons and ions.

This thesis deals with organic-based devices whose working mechanism involves electrolytes. By measuring electrochromism induced by the field in isolated segments of conjugated polymer films, which is in contact with an electrolyte, the direction and the magnitude of the electric field along an electrolyte is quantified (paper I). In addition, using a polyanionic proton conductor in organic field-effect transistor (OFET) as gate dielectric results in low operation voltage and fast response thanks to the high capacitance of the electric double layer (EDLC) that is formed at organic semiconductor/ polyelectrolyte interface (paper III). Because an electrolyte is used as a gate insulator, the effect of the ionic currents on the performance of an EDLC-OFET has been investigated by varying the relative humidity of the device ambience (paper IV). Since the EDLC-OFET and the electrochromic display cell both are operated at low voltages, the transistor has been monolithically integrated with an electrochromic pixel, i.e. combining a solid state device and an electrochemical device (paper V). Further, a theoretical study of the electrostatic potential within a so called pen-heterojunction made up of two semi-infinite, doped semiconductor media separated by an electrolyte region is reported (paper II).

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2009. 58 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1228
National Category
Inorganic Chemistry
Identifiers
urn:nbn:se:liu:diva-15775 (URN)978-91-7393-735-1 (ISBN)
Public defence
2009-01-09, TP2, Täppan, Campus Norrköping, Linköpings universitet, Norrköping, 10:15 (English)
Opponent
Supervisors
Available from: 2008-12-03 Created: 2008-12-03 Last updated: 2017-02-03Bibliographically approved

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Miklavcic, Stan J.Said, Elias

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Physical Review E. Statistical, Nonlinear, and Soft Matter Physics: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Inorganic Chemistry

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