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Polyelectrolyte based organic field effect transistors
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
2007 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In this thesis work, the fabrication of dual gate organic field-effect transistors (DGOFETs) using polyanionic proton conductor named polyvinylphosphonic acid and acrylic acid P(VPA-AA), SiO 2 as gate insulating materials and poly(3-hexylthiophene) (P3HT) as organic semiconductor have been studied. Upon operation, the top insulating layer forms large electric double layer capacitors (EDLCs)at the Ti/P(VPA-AA) and P(VPAAA)/ P3HT interfaces. This new type of robust transistor, called as EDLC-OFET, displays fast response (<0.3 ms), a reasonably high field effect mobility (0.0030 cm² V -1 s-1), a low ION/IOFF ratio (150), and operates at low voltage (<1 V). Results concerning the influence of bottom gate on the DG-OFET are presented and discussed. The results presented are important for low-cost printed polymer electronics.

Also, various conducting polymer gate electrode in addition to laminated OFET to form EDLC-OFET have been tested. Conducting polymers include PEDOT:PSS and polyaniline (PANI).

Place, publisher, year, edition, pages
2007. , 50 p.
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-96237ISRN: LITH-ITN-ED-EX--07/014--SEOAI: diva2:644010
Subject / course
Electrical Engineering
Available from: 2013-08-29 Created: 2013-08-14 Last updated: 2013-08-29Bibliographically approved

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Mohammad Ahmed, Fareed
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