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Optimizing Pentacene Growth in Low-Voltage Organic Thin-Film Transistors Prepared by Dry Fabrication Techniques

Published online by Cambridge University Press:  10 December 2012

S. Gupta ,
K. C. Chinnam ,
M. Zelzer ,
R. Ulijn  and
H. Gleskova
S. Gupta
Affiliation:
Department of Electronic and Electrical Engineering
K. C. Chinnam
Affiliation:
Department of Electronic and Electrical Engineering
M. Zelzer
Affiliation:
Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, United Kingdom.
R. Ulijn
Affiliation:
Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, United Kingdom.
H. Gleskova
Affiliation:
Department of Electronic and Electrical Engineering
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Abstract

We have studied the effect of pentacene purity and evaporation rate on low-voltage organic thin-film transistors (OTFTs) prepared solely by dry fabrication techniques. The maximum field-effect mobility of 0.07 cm2/Vs was achieved for the highest pentacene evaporation rate of 0.32 Å/s and four-time purified pentacene. Four-time purified pentacene also led to the lowest threshold voltage of -1.1 V and inverse subthreshold slope of ∼100 mV/decade. In addition, pentacene surface was imaged using atomic force microscopy, and the transistor channel and contact resistances for various pentacene evaporation rates were extracted and compared to field-effect mobilities.

Keywords

devicesorganicsemiconducting
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1435: Symposium J – Organic and Hybrid-Organic Electronics , 2012 , mrss12-1435-j06-07
Copyright
Copyright © Materials Research Society 2012

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References

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