Title

Space charge limited conduction with exponential trap distribution in reduced graphene oxide sheets

Authors

Authors

D. Joung; A. Chunder; L. Zhai;S. I. Khondaker

Comments

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Abbreviated Journal Title

Appl. Phys. Lett.

Keywords

ELECTRICAL-CONDUCTIVITY; TRANSPARENT; SINGLE; FILMS; Physics, Applied

Abstract

We elucidate on the low mobility and charge traps of the chemically reduced graphene oxide (RGO) sheets by measuring and analyzing temperature dependent current-voltage characteristics. The RGO sheets were assembled between source and drain electrodes via dielectrophoresis. At low bias voltage the conduction is Ohmic while at high bias voltage and low temperatures the conduction becomes space charge limited with an exponential distribution of traps. We estimate an average trap density of 1.75 x 10(16) cm(-3). Quantitative information about charge traps will help develop optimization strategies of passivating defects in order to fabricate high quality solution processed graphene devices. (C) 2010 American Institute of Physics. [doi:10.1063/1.3484956]

Journal Title

Applied Physics Letters

Volume

97

Issue/Number

9

Publication Date

1-1-2010

Document Type

Article

Language

English

First Page

3

WOS Identifier

WOS:000282187200056

ISSN

0003-6951

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