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Chemical doping of organic field-effect transistors

Seijen, F. van (2010) Chemical doping of organic field-effect transistors. Master's Thesis / Essay, Physics.

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Since the discovery of highly conducting polymers, chemically doped polyacetylene, in 1977 [1] huge research effort is done for electrical applications of conjugated polymers. The advantages of plastics that they are strong, lightweight and cheap make them interesting for several electrical applications. The combination of these properties with the opto-electronic functionality of polymers make them suitable for various opto-electronic devices, such as light-emitting diodes, solar cells and integrated circuits. One of the newer research fields for organic semiconductors is the use of field-effect transistors as chemical and biological sensors. The ability to transduce chemical reactions into electrical signals make OFETs very suitable for a broad range of detection applications. However, to make a reliable sensor the characteristic changes in the OFET due to the reactions should be known. In this research project we investigated the response of a polymer to chemically added dopant molecules. We used two different methods for this investigation. Firstly we doped the polymer by adding dopant molecules already in solution to get a better understanding of the doping process. Secondly we doped OFETs by exposing them to an acidic gas. In this way we investigated the response of an OFET exposed to gasses, for the use as a gas sensor

Item Type: Thesis (Master's Thesis / Essay)
Degree programme: Physics
Thesis type: Master's Thesis / Essay
Language: English
Date Deposited: 15 Feb 2018 07:46
Last Modified: 15 Feb 2018 07:46

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