Title

Schottky diode via dielectrophoretic assembly of reduced graphene oxide sheets between dissimilar metal contacts

Authors

Authors

M. R. Islam; D. Joung;S. I. Khondaker

Comments

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Abbreviated Journal Title

New J. Phys.

Keywords

CHEMICALLY DERIVED GRAPHENE; GRAPHITE OXIDE; AQUEOUS DISPERSIONS; FILMS; NANOPARTICLES; TRANSPARENT; FABRICATION; DEVICE; NANOPLATELETS; NANOSCALE; Physics, Multidisciplinary

Abstract

We demonstrate the fabrication of reduced graphene oxide (RGO) Schottky diodes via dielectrophoretic (DEP) assembly of RGO between two dissimilar metal contacts. Titanium (Ti) was used to make a Schottky contact, while palladium (Pd) was used to make an Ohmic contact. From the current-voltage characteristics, we obtain rectifying behavior with a rectification ratio of up to 600. The ideality factor was high (4.9), possibly due to the presence of a large number of defects in the RGO sheets. The forward biased turn-on voltage was 1V, whereas the reverse biased breakdown voltage was -3.1 V, which improved further upon mild annealing at 200 degrees C and can be attributed to an increase in the work function of RGO due to annealing.

Journal Title

New Journal of Physics

Volume

13

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

10

WOS Identifier

WOS:000289065800001

ISSN

1367-2630

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