- Small Hysteresis Nanocarbon-Based Integrated Circuits on Flexible and Transparent Plastic Substrate -
Author : Woo Jong Yu, Si Young Lee, Sang Hoon Chae, David Perello, Gang Hee Han, Minhee Yun, and
Young Hee Lee
ABSTRACT: We report small hysteresis integrated circuits by introducing monolayer graphene for the electrodes and a singlewalled carbon nanotube network for the channel. Small hysteresis of the device originates from a defect-free graphene surface, where hysteresis was modulated by oxidation. This uniquely combined nanocarbon material device with transparent and flexible properties shows remarkable device performance; subthreshold voltage of 220 mV decade-1, operation voltage of less than 5 V, n/off ratio of approximately 104, mobility of 81 cm2 V-1 s-1, transparency of 83.8% including substrate, no
significant transconductance changes in 1000 times of bending test, and only 36% resistance decrease at a tensile strain of 50%. Furthermore, because of the nearly Ohmic contact nature between the graphene and carbon nanotubes, this device demonstrated a contact resistance 100 times lower and a mobility 20 times higher, when compared to an Au electrode.
http://pubs.acs.org/doi/abs/10.1021/nl104488z