Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 25: Interfaces and Thin Films II
CPP 25.9: Vortrag
Dienstag, 13. März 2018, 12:15–12:30, PC 203
Thin films of perflourinated sexithiophene and blends with sexithiophene — •Berthold Reisz1, Simon Weimer1, Rupak Banerjee2, Clemens Zeiser1, Christopher Lorch1, Giuliano Duva1, Johannes Dieterle1, Keiichirou Yonezawa3, Jin-Peng Yang3, Nobuo Ueno3, Satoshi Kera3,4, Alexander Hinderhofer1, Alexander Gerlach1, and Frank Schreiber1 — 1Universität, Tübingen, Deutschland — 2IIT, Gandhinagar, India — 3Chiba University, Chiba, Japan — 4Institute for Molecular Science, Okazaki, Japan
This is the first study of thin films containing perfluorinated sexithiophene (PF6T), a molecule which was firstly synthesized in 2001 [1]. We found a new thin film polymorph and a coexistence of lying-down and standing-up molecules depending on the substrate temperature during organic molecular beam deposition [2]. Furthermore, we prepared blended thin films by co-evaporation of PF6T and its non-fluorinated counterpart 6T at different mixing ratios and examined their morphology, as well as their electronic and optical properties [2]. Atomic force microscopy shows a continuous transition from terraced islands to tall columnar features with increasing amount of PF6T. Grazing incidence X-ray diffraction patterns indicate that an excess of 6T-molecules is segregated from a statistically mixed phase. Finally, UPS data and optical absorption measurements suggest that 6T-PF6T blends could serve as a donor-acceptor system for optoelectronic applications.
[1] Y. Sakamoto et al., J. Am. Chem. Soc. 123 (2001)
[2] B. Reisz et al., J. Mater. Res. 32 (2017)