Sequentially assembled graphene layers on silicon, the role of uncertainty principles in graphene–silicon Schottky junctions

Electrons in an atom-thin sheet barely move out of the sheet, so the uncertainty principle links a 2D layer's thickness to how easily charge enters the material beneath it. We stacked uncoupled CVD graphene layers one by one on silicon to test this on a macroscopic device.

• Sequentially assembled CVD graphene layers stay electronically uncoupled.
• In-plane current scales with the number of assembled layers.
• Layer thickness strongly modifies charge injection and the reverse saturation current of the graphene–silicon junction.

Fig. 2 of the paper, © Wiley-VCH