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Proceedings Paper

Practicability of the development of design tools for polymer TFT circuit development
Author(s): Munira Raja; Naser Sedghi; D. Donaghy; Giles Lloyd; Sam Badriya; Simon J. Higgins; Bill Eccleston
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Paper Abstract

Polymer electronics increasingly needs circuit design tools based on simple but accurate device models. It also needs scaling rules and ultimately its own form of Moore's Law. Such models must include accurate conduction equations. Here we begin the development of device models based on the Universal Mobility Law which is itself the basis of roadmapping. This law is the physical manifestation of variable range hopping and this is widely recognized as a dominant mechanism, except perhaps at the highest doping levels. By interpreting this law in terms of the relationship between mobility and carrier density the gradual channel equation is redeveloped below and above pinch-off. It is immediately apparent that mobility is not an appropriate measure of the speed of circuits. Two new parameters K1 and m are introduced. They can be found from accurate measurements on Schottky barriers and give the maximum possible performance. Real performance is always less than this. The values of K and m for a particular process can be assessed above pinch-off and with stable polymer they can be used to accurately predict the output characteristics.

Paper Details

Date Published: 8 September 2004
PDF: 10 pages
Proc. SPIE 5464, Organic Optoelectronics and Photonics, (8 September 2004); doi: 10.1117/12.547722
Show Author Affiliations
Munira Raja, Univ. of Liverpool (United Kingdom)
Naser Sedghi, Univ. of Liverpool (United Kingdom)
D. Donaghy, Univ. of Liverpool (United Kingdom)
Giles Lloyd, Avecia Ltd. (United Kingdom)
Sam Badriya, Univ. of Liverpool (United Kingdom)
Simon J. Higgins, Univ. of Liverpool (United Kingdom)
Bill Eccleston, Univ. of Liverpool (United Kingdom)

Published in SPIE Proceedings Vol. 5464:
Organic Optoelectronics and Photonics
Paul L. Heremans; Michele Muccini; Hans Hofstraat, Editor(s)

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