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Filamentary switching of Rose Bengal devices
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.
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.ORCID iD: 0000-0001-5154-0291
(English)Manuscript (preprint) (Other academic)
Abstract [en]

Switch devices with a structure of metal / orgamc layer / metal were fabricated, with the organic layer being Rose Bengal sodium salt, Rose Bengal bis(tricthylammonium) salt, Rose Bengal lactone and Fluorescein. All devices showed reversible switch behavior, ruling out electro reduction or conformational switching. Furthermore, only devices with ITO as substrate and Al or Ag as top electrode showed reversible switch behavior. Electrical characterization of the ITO substrate indicated that the switching is due to the reversible formation of conducting filaments, initiated from the ITO.

National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-102204OAI: oai:DiVA.org:liu-102204DiVA: diva2:670506
Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2017-02-03
In thesis
1. Organic electronic switch devices
Open this publication in new window or tab >>Organic electronic switch devices
2006 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Since the discovery of conducting polymers three decades ago the field of organic electronics has evolved rapidly. Organic light emitting diodes have already reached the consumer market, while organic solar cells and transistors are rapidly maturing. One of the great benefits with this class of materials is that they can be processed from solution. This enables several very cheap production methods, such as printing and spin coating, and opens up the possibility to use unconventional substrates, such as flexible plastic foils and paper. Another great benefit is the possibility of tailoring the molecules through carefully controlled synthesis, resulting in a multitude of different functionalities. This is very interesting for nano applications, where devices are made of a small number of molecules or even a single molecule, and were the molecules can be designed to self-assembly.

This thesis reports how charge transport can be altered in solid-state organic electronic devices. This is done from both a dynamic perspective, as in impedance switch devices, and from a static perspective, as in the modification of electrode properties to improve charge injection. The first six chapters give a brief review of the field of solid-state organic electronics, with focus on electronic properties, impedance switch mechanisms and architecture.

Paper I and III treat Rose Bengal switch devices in detail- how to improve these devices for use in cross-point arrays (paper I) and the origin of the switch effect (paper III). Paper II investigates how the work function of a conducting polymer can be modified to allow for better electron injection into an organic light emitting diode.

Place, publisher, year, edition, pages
Linköping: Linköpings universitet, 2006. 70 p.
Series
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1280
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-38769 (URN)45552 (Local ID)91-85643-56-4 (ISBN)45552 (Archive number)45552 (OAI)
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2013-12-03

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Jakobsson, Fredrik L. E.Crispin, XavierBerggren, Magnus

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