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Research Interests

My re­se­arch in­te­rest is cen­te­red around novel organic semiconductors, based on organic molecules as well as hybrid perovskites. These ma­te­ri­als hold great po­ten­ti­al for the use in next ge­ne­ra­ti­on en­er­gy re­la­ted ap­p­li­ca­ti­ons such as light-emit­ting di­odes and pho­to­vol­taics, as well as elec­tro­nic ap­p­li­ca­ti­ons like tran­sis­tors and me­mo­ry de­vices.

In these mul­ti­laye­red struc­tu­res, char­ge trans­port bar­ri­ers bet­ween the different se­mi­con­duc­tors or to the in­or­ga­nic con­tact ma­te­ri­als play a cru­ci­al role for the de­vice per­for­mance. The­re­fo­re, my re­se­arch is focus on mea­su­ring, un­der­stan­ding, and in­flu­en­cing the en­er­ge­tic pro­per­ties and the alignment at in­ter­faces using photoelectron spectroscopy. I want to cor­re­la­te fin­dings re­gar­ding the en­er­ge­tic pro­per­ties with the elec­tro­nic per­for­mance and de­vice cha­rac­te­ris­tics. Fur­ther­mo­re, I in­ves­ti­ga­te the con­cept of controlled molecular do­ping in organic semiconductors, which makes it pos­si­ble to im­pro­ve the film and de­vice per­for­mance due to the pas­si­va­ti­on of un­wan­ted trap sta­tes, the in­crea­se in film con­duc­tivi­ty, and the pos­si­bi­li­ty to con­trol the Fermi level po­si­ti­on.

Curriculum Vitae

Since 11/2012 University of Cologne, Junior researcher (Habilitand) at the Institute for Physical Chemistry in the group of Prof. Klaus Meerholz. Head of the Surface Science Laboratory.
01/2018 – 06/2018

Technical University Dresden, Eleonore Trefftz Visiting Professor at the Center for Advancing Electronics Dresden (cfaed) and Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP).

10/2010 - 09/2012

Princeton University, DAAD Fellowship Post-Doc position at the Department of Electrical Engineering with Prof. Antoine Kahn.

09/2006 – 06/2010

Technical University Dresden, PhD studies at the Institut für Angewandte Photophysik in the group of Prof. Karl Leo. PhD thesis: Photoelectron Spectroscopy on Doped Organic Semiconductors and Related Interface.

01/2005 – 03/2006

Max-Planck-Institute for Solid State Research, in the group of Prof. Klaus Kern. Diplomarbeit (Master Thesis) on the topic. Rastertunnelmikroskopie und –spektroskopie an Halbleiternanostrukturen (English: Scanning tunneling microscopy and spectroscopy of semiconductor nanostructures).

08/2003 – 05/2004

NUI Maynooth, Erasmus Fellowship for a two semester studying abroad in Maynoot, Ireland.

2000 – 2006 University of Stuttgart, Studying physics with focus on astrophysics, particle physics, and nanotechnology.

Grants and Awards

Eleonore Trefftz fellowship Visiting Professorship (6 months) at the Technical University Dresden (cfaed/iapp)
QM2 Independence Grant

Funding through the German excellence initiative,  supporting young researchers at the University of Cologne

Travel grant by the Alexander von Humboldt-Stiftung  for Humboldt Frontiers Meeting in India
DAAD travel grant for JMRS conference in Kyoto
Emanuel-Goldberg-Preis of the Technical University of Dresden awarded for the PhD thesis 2010
DAAD Fellowshipfor a two year Post-Doc stay in Princeton, USA
Erasmus Fellowship for one year studying abroad in Maynooth, Ireland

Selected Publications (ResearchID: L-8402-2015)

Complete List of Publications and Presentations can be found here.


  • Verfahren zur Herstellung von Fulleren-Derivaten. Patent no. DE102010046040 A1 (2012)
  • Organische Solarzelle, Patent no. DE102011013897 A1 (2012)