liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Effects of the Ioinc Currents in Electrolyte-gated Organic Field-Effect Transistors
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology. (Organic Electronics)
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology. (Organic Electronics)
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology. (Organic Electronics)ORCID iD: 0000-0001-5154-0291
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology. (Organic Electronics)ORCID iD: 0000-0001-8845-6296
2008 (English)In: Advanced Functional Materials, ISSN 1616-301X, Vol. 18, no 21, 3529-3536 p.Article in journal (Refereed) Published
Abstract [en]

Polyelectrolytes are promising materials as gate dielectrics in organic field-effect transistors (OFETs). Upon gate bias, their polarization induces an ionic charging current, which generates a large double layer capacitor (10-500 µF cm-2) at the semiconductor/electrolyte interface. The resulting transistor operates at low voltages (<1 V) and its conducting channel is formed in 50 µs. The effect of ionic currents on the performance of the OFETs is investigated by varying the relative humidity of the device ambience. Within defined humidity levels and potential values, the water electrolysis is negligible and the OFETs performances are optimum.

Place, publisher, year, edition, pages
Weinheim: WILEY-VCH Verlag GmbH & Co. KGaA , 2008. Vol. 18, no 21, 3529-3536 p.
Keyword [en]
electrolytes, field-effect transistors, ionic conductivity, organic electronics
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-15724DOI: 10.1002/adfm.200701251OAI: oai:DiVA.org:liu-15724DiVA: diva2:127133
Available from: 2008-12-04 Created: 2008-12-01 Last updated: 2017-02-03Bibliographically 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
2. Polarization characteristics in polyelectrolyte thin film capacitors: Targeting field-effect transistors and sensors
Open this publication in new window or tab >>Polarization characteristics in polyelectrolyte thin film capacitors: Targeting field-effect transistors and sensors
2009 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Polymers are very attractive materials that can be tailored for specific needs and functionality. They can for instance be made electrically insulating or (semi)conducting, with specific mechanical properties. Polymers are often processable from a solution, which enables the use of low-cost manufacturing techniques to fabricate polymer devices. Polymer-based electronic and electrochemical devices and sensors have been developed.

This thesis is related to the polarization characteristics in polyelectrolyte thin film capacitor structures. The polarization characteristics have been analyzed at various humidity levels for polyelectrolyte capacitors alone and when incorporated as the gate-insulating material in polyelectrolyte-gated organic field-effect transistors. Both limitations and possibilities of this class of transistors have been identified. Also, a concept for wireless readout of a passively operated humidity sensor circuit is demonstrated. The sensing mechanism of this sensor is related to the polarization in a polyelectrolyte thin film capacitor. This sensor circuit can be manufactured entirely with common printing technologies of today and can be integrated into a low-cost passive sensor label.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2009. 40 p.
Series
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1412
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-51547 (URN)978-91-7393-535-7 (ISBN)
Presentation
2009-10-16, TP2, Täppan, Campus Norrköping, Linköpings universitet, Norrköping, 10:15 (English)
Opponent
Supervisors
Available from: 2009-11-05 Created: 2009-11-05 Last updated: 2017-02-03Bibliographically approved
3. Polyelectrolyte-Based Capacitors and Transistors
Open this publication in new window or tab >>Polyelectrolyte-Based Capacitors and Transistors
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Polymers are very attractive materials that can be tailored for specific needs and functionalities. Based on their chemical structure, they can for instance be made electrically insulating or semiconducting with specific mechanical properties. Polymers are often processable from a solution, which enables the use of conventional low-cost and high-volume manufacturing techniques to print electronic devices onto flexible substrates. A multitude of polymer-based electronic and electrochemical devices and sensors have been developed, of which some already has reached the consumer market.

This thesis focuses on polarization characteristics in polyelectrolyte-based capacitor structures and their role in sensors, transistors and supercapacitors. The fate of the ions in these capacitor structures, within the polyelectrolyte and at the interfaces between the polyelectrolyte and various electronic conductors (a metal, a semiconducting polymer or a network of carbon nanotubes), is of outermost importance for the device function. The humidity-dependent polarization characteristics in a polyelectrolyte capacitor are used as the sensing probe for wireless readout of a passively operated humidity sensor circuit. This sensor circuit can be integrated into a printable low-cost passive sensor label. By varying the humidity level, limitations and possibilities are identified for polyelectrolyte-gated organic field-effect transistors. Further, the effect of the ionic conductivity is investigated for polyelectrolyte-based supercapacitors. Finally, by using an ordinary electrolyte instead of a polyelectrolyte and a high-surface area (supercapacitor) gate electrode, the device mechanisms proposed for electrolyte-gated organic transistors are unified.

Place, publisher, year, edition, pages
Norrköping: Linköping University Electronic Press, 2011. 56 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1370
Keyword
Organic electronics, Polarization, Polyelectrolyte, Transistor, Polymer, Sensor, Capacitor
National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-67852 (URN)978-91-7393-160-1 (ISBN)
Public defence
2011-06-13, K3, Kåkenhus, Campus Norrköping, Linköpings universitet, Norrköping, 10:15 (English)
Opponent
Supervisors
Available from: 2011-05-02 Created: 2011-04-29 Last updated: 2013-09-12Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textLink to Ph.D. Thesis (Elias Said)Link to Licentiate Thesis (Oscar Larsson)

Authority records BETA

Said, EliasLarsson, OscarBerggren, MagnusCrispin, Xavier

Search in DiVA

By author/editor
Said, EliasLarsson, OscarBerggren, MagnusCrispin, Xavier
By organisation
Department of Science and TechnologyThe Institute of Technology
In the same journal
Advanced Functional Materials
Inorganic Chemistry

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 443 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf