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Proceedings Paper

Material properties and field-effect transistor characteristics of hybrid organic/graphene active layers
Author(s): Tae-Jun Ha; Jongho Lee; Sk. Fahad Chowdhury; Deji Akinwande; Ananth Dodabalapur
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Paper Abstract

We report on the material properties and device characteristics of field-effect transistors (FETs) consisting of hybrid mono-layer graphene/organic semiconductor active layers. By capping with selected organic and polymeric layers, transformation of the electronic characteristics of mono-layer graphene FETs was observed. The off-state current is reduced while the on-state current and field-effect mobility are either unaffected or increased after depositing π−conjugated organic semiconductors. Significantly, capping mono-layer graphene FETs with fluoropolymer improved the on-off current ratio from 5 to 10 as well as increased the field-effect mobility by factor of two compared to plain graphene FETs. Removal of π−conjugated organic semiconductors or fluoropolymer from graphene FETs results in a return to the original electronic properties of mono-layer graphene FETs. This suggests that weak reversible electronic interactions between graphene and π−conjugated organic semiconductors/fluoropolymer favorably tune the material and electrical characteristics of mono-layer graphene.

Paper Details

Date Published: 11 October 2012
PDF: 7 pages
Proc. SPIE 8478, Organic Field-Effect Transistors XI, 847810 (11 October 2012); doi: 10.1117/12.929919
Show Author Affiliations
Tae-Jun Ha, The Univ. of Texas at Austin (United States)
Jongho Lee, The Univ. of Texas at Austin (United States)
Sk. Fahad Chowdhury, The Univ. of Texas at Austin (United States)
Deji Akinwande, The Univ. of Texas at Austin (United States)
Ananth Dodabalapur, The Univ. of Texas at Austin (United States)

Published in SPIE Proceedings Vol. 8478:
Organic Field-Effect Transistors XI
Zhenan Bao; Iain McCulloch, Editor(s)

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