Tailoring Opto-electronic Properties of 2D Semiconductors in van der Waals Heterostructures
- PC Department Seminar
- Date: Apr 24, 2023
- Time: 11:00 AM (Local Time Germany)
- Speaker: Lutz Waldecker
- RWTH Aachen
- Location: Building G
- Room: 2.06
- Host: Sebastian Mährlein
At the same time, charge- and energy transfer determine the doping level of the TMD and the lifetime of excitations. By embedding TMDs into van der Waals heterostructures, their properties can thus be tailored in novel ways, which are complementary to traditional material engineering, such as substitutional doping.
Here, we will describe our advances in understanding the dielectric screening as well as the energy transfer in TMD – graphene heterostructures. We will discuss how the screening modifies the dispersion of the electronic bands and the exciton binding energy. We will discuss how heterostructures of TMDs, graphene and hBN spacer layers can be used to tune the screening and the energy-transfer times.