Researchers from Purdue University developed a new graphene-like 2D material from phosphorus. They call the new material phosphorene and they say that this is the first native 2D p-type semiconductor, making it more useful than graphene to make transistors.
Together with MoS2 (a 2D n-type semiconductor), it is now possible to build switches made from 2D materials. Graphene in its basic form is a superconductor and so is less suited to make transistors.
The researcher produced phosphorene and started studying it. It has a much lower electron mobility than graphene, but it's around 3-5 times higher than MoS2 and about 3 times higher than silicon and so this is a promising material. The researchers continued to actually create an inverter (a simple circuit element) by depositing MoS2 and phosphorene on the same silicon wafer.
To learn how to do it, follow this link: http://www.quantumwise.com/publications/tutorials/mini-tutorials/238