Dresden 2014 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 18: Organic Thin Films I
DS 18.9: Vortrag
Mittwoch, 2. April 2014, 11:45–12:00, CHE 91
Real-time in situ growth study of organic semiconductor heterostructures relevant for organic photovoltaics — •Christopher Lorch, Rupak Banerjee, Johannes Dieterle, Christian Frank, Heiko Frank, Simon Weimer, Alexander Gerlach, and Frank Schreiber — Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, 72076 Tübingen
The organic semiconductors (OSCs) sexithiophene (6T), diindenoperylene (DIP) and buckminsterfullerene C60, when used as active layers in organic photovoltaic cells, have recently shown promising device parameters [1,2]. We have performed real-time growth studies of different combinations and heterostructures [3] of these compounds (i.e. material A on material B, mixtures A:B) at various substrate temperatures and deposition rates. Using in situ X-ray reflectivity and grazing incidence X-ray diffraction we investigated the growth and the resulting film structure of these compounds in the out-of-plane and in-plane direction, respectively. We present the results of the growth measured in real-time and the structure of the compounds under different preparation conditions as well as for different material combinations. Surprising findings lead to viable routes for tailoring the film structure which might help to improve device parameters.
[1] J. Wagner et al., Adv. Funct. Mater., 20, 4295 (2010)
[2] U. Hörmann et al., Phys. Status Solidi RRL, 5, 241 (2011)
[3] A. Hinderhofer et al., ChemPhysChem 13, 628-643 (2012)