Hybrid Van der Waals heterostructures

Layered heterostructures integrating two-dimensional materials such as graphene or transition metal dichalcogenides and nanometer-scale layers of inorganic materials are attracting considerable attention since a few years. Organic materials remain however poorly explored in this context, in particular for ultra-thin layers down to the single molecule level. Mixed-dimensional, hybrid heterostructures have a lot to offer in terms of interface physics in fields such as, for instance, polaritonics, excitonics or topological phases and provide new emergent behavior for electronics and optoelectronics

We recently started works to provide a better fundamental understanding of the interface in hybrid, mixed-dimensional Van der Waals heterostructures with high electronic bandwidth. We will design, fabricate and study vertical heterostructures in the form of organic/graphene/organic stacks and the quality of the organic/graphene interface will be investigated to optimize charge injection through the graphene base, with potential applications in vertical, permeable-base organic transistors.

Work in progress, more to come.

Main coll.: M. Calame (EMPA, Dübendorf, Switzerland)