Abbreviated Journal Title
New J. Phys.
CHEMICALLY DERIVED GRAPHENE; GRAPHITE OXIDE; AQUEOUS DISPERSIONS; FILMS; NANOPARTICLES; TRANSPARENT; FABRICATION; DEVICE; NANOPLATELETS; NANOSCALE; Physics, Multidisciplinary
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.
New Journal of Physics
Islam, Muhammad R.; Joung, Daeha; and Khondaker, Saiful I., "Schottky diode via dielectrophoretic assembly of reduced graphene oxide sheets between dissimilar metal contacts" (2011). Faculty Bibliography 2010s. 1419.