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Durham University

Department of Engineering

Staff Profile

Publication details for Professor Michael Petty

Yun, Y, Pearson, C, Cadd, DH, Thompson, RL & Petty, MC (2009). A cross-linked poly(methyl methacrylate) gate dielectric by ion-beam irradiation for organic thin-film transistors. Organic Electronics 10(8): 1596-1600.
  • Publication type: Journal Article
  • ISSN/ISBN: 1566-1199

Author(s) from Durham


The electrical characteristics of pentacene organic thin-film transistors (OTFTs) using cross-linked poly(methyl methacrylate) (PMMA) as the gate dielectric are reported. Ultra-thin films of cross-linked PMMA could be obtained by spin-coating and subsequent irradiation using a 1.515 MeV He-4(+) ion beam. The resulting film, with a thickness of 33 nm, possessed a low leakage current density of about 10(-6) A cm(-2) for fields up to 2 MV cm(-1). OTFTs incorporating the cross-linked dielectric operated at relatively low voltages, <10 V, and exhibited a mobility of 1.1 cm(2) V-1 s(-1), a threshold voltage of -1 V, a subthreshold slope of 220 mV per decade and an on/off current ratio of 1.0 x 10(6). (C) 2009 Elsevier B.V. All rights reserved.