Molecular Crystals and Liquid Crystals, Vol.514, 411-421, 2009
Fabrication of Organic Thin-Film Transistors with Roll-Printed Electrodes Using Patterned Polymer Stamp
The roll-printed electrodes of organic thin-film transistors (OTFTs) were fabricated by gravure or flexography printing using patterned poly(dimethylsiloxane) (PDMS) stamp with various channel lengths and low-resistance silver (Ag) paste on plastic substrates. The roll-printed OTFTs used poly(vinyl)(phenol) polymeric dielectrics and bis(triisopropyl-silylethynyl) pentacene organic semiconductors. The roll-printed OTFTs obtained had a field-effect mobility 0.08 (+/- 0.02) cm(2)/Vs, an on/off off current ratio of 10(4) and a subthreshold slope of 2.53 V/decade. The roll printing using patterned PDMS stamp for Ag paste transferring made it possible to fabricate a printed OTFT with a channel length as small as to 12 mu m on plastic substrate.