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Optimizing pentacene growth in low-voltage organic thin-film transistors prepared by dry fabrication techniques

Authors :
Gupta, Swati
Chinnam, Krishna Chytanya
Zelzer, Mischa
Ulijn, Rein
Gleskova, Helena
Hayden, Oliver
So, Franky
Blom, Paul
Richter, Henning
Park, Jongwook
Source :
2012 Materials Research Society Spring Meeting-Symposium J – Organic and Hybrid-Organic Electronics
Publication Year :
2012
Publisher :
Materials Research Society, 2012.

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.

Subjects

Subjects :
QD450
TK

Details

Language :
English
Database :
OpenAIRE
Journal :
2012 Materials Research Society Spring Meeting-Symposium J – Organic and Hybrid-Organic Electronics
Accession number :
edsair.core.ac.uk....ba97c3748a2837d885ae2049bc41afdf