Charge transfer at organic semiconductor hetero-interfaces: Towards a unified picture in intermediate cases of ground state and excited state scenarios

In this proposal, we study the charge transfer at organic semiconductor hetero-interfaces using the joint expertise of three groups. Our aim is to obtain a comprehensive understanding of the electronic processes and optical properties involved by combining complementary experimental techniques, including growth and structural studies, electrical transport investigations, optical spectroscopy and analysis of the electronic structure. Interaction between the involved molecules appear both in the ground state and after optical excitation. Suitable material combinations allowing for charge transfer across their mutual interfaces will be identified and the electronic properties of the resulting organic semiconductor heterostructures will be studied. The focus is on the degree of charge transfer, the binding energy and the anisotropy of the charge transfer state, as well as the shape of density of states.

Principal Investigators
Opitz, Andreas PD Dr. rer. nat. (Details) (Structure, Dynamics and electronic Properties of Molecular Systems)

Duration of Project
Start date: 05/2019
End date: 05/2022

Research Areas
Experimental Condensed Matter Physics

Research Areas
Experimentelle Physik, kondensierte Materie

G. Duva, P. Beyer, R. Scholz, V. Belova, A. Opitz, A. Hinderhofer, A. Gerlach, F. Schreiber
Ground-state charge-transfer interactions in donor:acceptor pairs of organic semiconductors. A spectroscopic study of two representative systems
Phys. Chem. Chem. Phys. 21 (2019) 17190. DOI: 10.1039/C9CP02939G

P. Beyer, D. Pham, C. Peter, N. Koch, E. Meister, W. Brütting, L. Grubert, S. Hecht, D. Nabok, C. Cocchi, C. Draxl, A. Opitz
State-of-matter-dependent charge-transfer interactions between planar molecules for doping applications
Chem. Mater. 31 (2019) 1237. DOI: 10.1021/acs.chemmater.8b01447

Last updated on 2021-04-01 at 17:48