Density of trap states in a polymer field-effect transistor

Kim, Seohee, Ha, Tae-Jun, Sonar, Prashant, & Dodabalapur, Ananth (2014) Density of trap states in a polymer field-effect transistor. Applied Physics Letters, 105(13), p. 133302.

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We report a more accurate method to determine the density of trap states in a polymer field-effect transistor. In the approach, we describe in this letter, we take into consideration the sub-threshold behavior in the calculation of the density of trap states. This is very important since the sub-threshold regime of operation extends to fairly large gate voltages in these disordered semiconductor based transistors. We employ the sub-threshold drift-limited mobility model (for sub-threshold response) and the conventional linear mobility model for above threshold response. The combined use of these two models allows us to extract the density of states from charge transport data much more accurately. We demonstrate our approach by analyzing data from diketopyrrolopyrrole based co-polymer transistors with high mobility. This approach will also work well for other disordered semiconductors in which sub-threshold conduction is important.

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2 citations in Web of Science®
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ID Code: 79305
Item Type: Journal Article
Refereed: Yes
DOI: 10.1063/1.4896913
ISSN: 1077-3118
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 American Institute of Physics
Deposited On: 08 Dec 2014 01:59
Last Modified: 23 Jun 2017 11:02

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