Interlayer excitons in MoSe<sub>2</sub>/2D perovskite hybrid heterostructures – the interplay between charge and energy transfer
Miriam Karpińska, J. Jasiński, Roman Kempt, Jonas D. Ziegler, Harry C. Sansom, Takashi Taniguchi, Kenji Watanabe, Henry J. Snaith, Alessandro Surrente, Mateusz Dyksik, D. K. Maude, Ł. Kłopotowski, Alexey Chernikov, Agnieszka Kuc, Michał Baranowski, Paulina Płochocka
Abstract
heterostructures by combining optical spectroscopy and density functional theory (DFT) calculations. We show that band alignment facilitates charge transfer. Namely, holes are transferred from TMDs to 2D perovskites, while the electron transfer is blocked, resulting in the formation of interlayer excitons. Moreover, we show that the energy transfer mechanism can be turned on by an appropriate alignment of the excitonic states, providing a rule of thumb for the deterministic control of the excitation transfer mechanism in TMD/2D-perovskite heterostructures.