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C3.1 - Electronic structure of templated thin films


Principle Investigator: Dr. Selina Olthof

This project will investigate the influence of growth modes on the energy level landscape of templated thin organic films using photoelectron spectroscopy. Looking at thermally evaporated molecules on different highly ordered substrate surfaces we intend to develop an understanding how ordering can be achieved via specific substrate–molecule interactions. We are interested to understand how this order influences the width of the density of states and with it the values for ionization energy and electron affinity. These results will be correlated with Density Functional Theory calculations (E1 & E2). Our findings will allow us to design ideal injection and transport layers which can subsequently be applied in organic electronic devices (D2 & D3).


[1] H. Sahabudeen, H. Qi, M. Ballabio, M. Položij, S. Olthof, R. Shivhare, Y. Jing, S. Park, K. Liu, T. Zhang, J. Ma, B. Rellinghaus, S. Mannsfeld, T. Heine, M. Bonn, E. Cánovas, Z. Zheng, U. Kaiser, R. Dong, X. Feng, Angew. Chemie Int. Ed. 59, 6028 (2020).

[2] F.-J. Kahle, C. Saller, S. Olthof, C. Li, J. Lebert, S. Weiß, E.M. Herzig, S. Hüttner, K. Meerholz, P. Strohriegl, A. Köhler, J. Phys. Chem. C 122, 21792 (2018).

[3] S. Olthof, S. Mehraeen, S.K. Mohapatra, S. Barlow, V. Coropceanu, J.L. Brédas, S.R. Marder, A. Kahn, Phys. Rev. Lett. 109, 176601 (2012).

[4] S. Olthof, R. Meerheim, M. Schober, K. Leo, Phys. Rev. B 79, 245308 (2009).