Charge transfer at organic semiconductor hetero-interfaces


In this project we plan to study 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 involved by combining complementary experimental techniques, including growth and structural studies, electrical transport investigations, optical spectroscopy and analysis of the electronic structure. Interface doping is a promising approach to tune the electronic properties of organic semiconductors without significantly changing their molecular arrangement. We aim for observing and exploiting charge transfer effectsat organic donor-acceptor interfaces occurring in the ground state. 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. By systematically varying the energy level offset between the HOMO of the donor and the LUMO of the acceptor we plan to tune the electronic properties of the D/A interface.


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

Duration of Project
Start date: 03/2014
End date: 12/2017

Research Areas
Experimental Condensed Matter Physics

Research Areas
Experimentelle Physik, kondensierte Materie

Publications
V. Belova, P. Beyer, E. Meister, T. Linderl, M.-U. Halbich, M. Gerhard, S. Schmidt, T. Zechel, T. Meisel, A.V. Generalov, A.S. Anselmo, R. Scholz, O. Konovalov, A. Gerlach, M. Koch, A. Hinderhofer, A. Opitz, W. Brütting, F. Schreiber
Evidence for Anisotropic Electronic Coupling of Charge Transfer States in Weakly Interacting Organic Semiconductor Mixtures
J. Am. Chem. Soc. 139 (2017) 8474. DOI: 10.1021/jacs.7b01622

A. Opitz
Energy level alignment at planar organic heterojunctions: influence of contact doping and molecular orientation
Journal of Physics: Condensed Matter 29 (2017) 133001. DOI: 10.1088/1361-648X/aa5a6c

A. Opitz, A. Wilke, P. Amsalem, M. Oehzelt, R.-P. Blum, J.P. Rabe, T. Mizokuro, U. Hörmann, R. Hansson, E. Moons, N. Koch
Organic heterojunctions: Contact-induced molecular reorientation, interface states, and charge re-distribution
Scientific Reports 6 (2016) 21291. DOI: 10.1038/srep21291

L. Pithan, E. Meister, C. Jin, C. Weber, A. Zykov, K. Sauer, W. Brütting, H. Riegler, A. Opitz, S. Kowarik
Thermally driven smoothening of molecular thin films: Structural transitions in n-alkane layers studied in real-time
J. Chem. Phys. 143 (2015) 164707. DOI: 10.1063/1.4934501

G. Duva, L. Pithan, C. Zeiser, B. Reisz, J. Dieterle, B. Hofferberth, P. Beyer, L. Bogula, A. Opitz, S. Kowarik, A. Hinderhofer, A. Gerlach, F. Schreiber
Thin film texture and optical properties of donor:acceptor complexes. Diindenoperylene:F6TCNNQ vs Alpha-Sexithiophene:F6TCNNQ
J. Phys. Chem. C 122 (2018) 18705. DOI: 10.1021/acs.jpcc.8b03744

Last updated on 2020-01-06 at 18:00