Biris, A.R. – TechConnect Briefs

Large area graphene sheets synthesized on a bi-metallic catalyst system

Biris, A.R., Biris, A.S., Biswas, A., Courte, A., Dervishi, E., Li, Z., Shyaka, J., Umwungeri, J.L., Watanabe, F., University of Arkansas at Little Rock, US

Few layer graphene sheets were synthesized on a bimetallic catalyst system utilizing acetylene as the hydrocarbon source. This is a low-cost method for large scale production of graphene via radio-frequency chemical vapor deposition. The as-produced [...]

p-Type Single-Wall Garbon Nanotube Network on n-Type Si for Heterojunction Photovoltaic Cells

Biris, A.R., Biris, A.S., Dervishi, E., Li, Z., Mahmood, M., Saini, V., Xu, Y., University of Arkansas at Little Rock, US

The solar cells based on high-density p-n heterojunctions between single wall carbon nanotubes (SWNTs) and n-type crystalline silicon were produced with airbrushing technique. The SWNTs/n-Si heterojunction is rectifying. Under optical excitation the numerous heterojunctions formed [...]