Integration of reduced graphene oxide into organic field-effect transistors as conducting electrodes and as a metal modification layer

The characteristics of thin-film transistors (TFTs) with pentacene active layers and source/drain contact layers consisting of either Au, Au coated with highly reduced graphene oxide (HRG), or plain HRG, are compared. It is shown that the incorporation of HRG as an interfacial material between gold source/drain contacts and pentacene in TFT devices results in improved electrical characteristics. The effect of the HRG layer is to improve the gold/pentacene interface leading to better charge injection, lower losses at the interface, and, consequently, higher effective carrier mobility.

[1]  T. Jackson,et al.  Pentacene TFT with improved linear region characteristics using chemically modified source and drain electrodes , 2001, IEEE Electron Device Letters.

[2]  Antoine Kahn,et al.  Polarization at the gold/pentacene interface , 2005 .

[3]  H. Sirringhaus,et al.  Integrated optoelectronic devices based on conjugated polymers , 1998, Science.

[4]  Inhwa Jung,et al.  Colloidal suspensions of highly reduced graphene oxide in a wide variety of organic solvents. , 2009, Nano letters.

[5]  T. Jackson,et al.  Morphology and electrical transport in pentacene films on silylated oxide surfaces , 2004 .

[6]  Paul S. Weiss,et al.  Microcontact insertion printing , 2007 .

[7]  Antoine Kahn,et al.  Impact of electrode contamination on the α-NPD/Au hole injection barrier , 2005 .

[8]  H. Sirringhaus,et al.  High-Resolution Ink-Jet Printing of All-Polymer Transistor Circuits , 2000, Science.

[9]  H. Stapert,et al.  Positive microcontact printing with mercaptoalkyloligo(ethylene glycol)s. , 2006, Langmuir : the ACS journal of surfaces and colloids.

[10]  K. Stevenson,et al.  High‐Resolution Characterization of Pentacene/Polyaniline Interfaces in Thin‐Film Transistors , 2006 .

[11]  P. Paul Ruden,et al.  Film and contact resistance in pentacene thin-film transistors: Dependence on film thickness, electrode geometry, and correlation with hole mobility , 2006 .

[12]  Taehyoung Zyung,et al.  Surface-Treatment Effects on Organic Thin-Film Transistors , 2005 .

[13]  Taehyoung Zyung,et al.  The effects of surface treatment on device performance in pentacene-based thin film transistor , 2006 .

[14]  J. Nielsen,et al.  4-Nitrothiophenol SAM on Au(111) Investigated by in Situ STM, Electrochemistry, and XPS , 2001 .

[15]  Stephen R. Forrest,et al.  Effects of film morphology and gate dielectric surface preparation on the electrical characteristics of organic-vapor-phase-deposited pentacene thin-film transistors , 2002 .

[16]  H. Sirringhaus,et al.  Contact effects of solution-processed polymer electrodes: Limited conductivity and interfacial doping , 2005 .