Dresden 2017 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 44: Postersession II
DS 44.33: Poster
Donnerstag, 23. März 2017, 17:00–19:00, P1C
Morphological studies of Squaraine-Fullerene blend films — •Angelika Maderitsch1, Oliya Sadrillaevna Abdullaeva1, Matthias Schulz2, Arne Lützen2, Jürgen Parisi1, and Manuela Schiek1 — 1Energy and Semiconductor Research Laboratory, Institute of Physics, University of Oldenburg, Germany — 2Kekulé Institute of Organic Chemistry and Biochemistry, Rheinische-Friedrich-Wilhelms-University of Bonn, Germany
Organic photoelectric materials are promising candidates for the development of biocompatible artificial photoreceptors. Currently, we are investigating a photoactive layer consisting of an anilino-squaraine donor (SQIB), a small molecular model organic semiconductor, blended with a fullerene acceptor (PCBM). After annealing at high temperatures the crystalline film shows two distinct structural motifs with different properties.1 SEM and TEM are applied to gain a deeper insight to the morphology of the photoactive layer. TEM samples are prepared via floating and FIB-milling providing cross section lamellae. The predominant structure (platelets) shows a rather flat surface partly with elongated pinholes and borders between different crystalline orientations. The discontinuously localised second structure (ferns) is less homogeneous and significantly rougher. Voids between ferns seem to consist of very thin PCBM film. The results are compared to those of other methods like AFM, XRD and optical microscopy.
(1) Abdullaeva et al., Langmuir 2016 32 (33), 8533-8542, DOI:10.1021/acs.langmuir.6b02085