Refine
Year of publication
Document Type
- Article (39)
- Postprint (7)
- Monograph/Edited Volume (1)
- Conference Proceeding (1)
- Doctoral Thesis (1)
- Report (1)
- Review (1)
Is part of the Bibliography
- yes (51)
Keywords
- Auger electron spectroscopy (3)
- children (3)
- graphomotor control (3)
- handwriting (3)
- movement kinematics (3)
- photochemistry (3)
- photofragmentation (3)
- tablet (3)
- ultrafast dynamics (3)
- writing acquisition (3)
Institute
- Institut für Physik und Astronomie (12)
- Institut für Biochemie und Biologie (10)
- Institut für Geowissenschaften (7)
- Institut für Chemie (6)
- Extern (2)
- Fachgruppe Betriebswirtschaftslehre (2)
- Institut für Ernährungswissenschaft (2)
- Institut für Germanistik (2)
- Mathematisch-Naturwissenschaftliche Fakultät (2)
- Strukturbereich Bildungswissenschaften (2)
The structure and morphology on different length scales dictate both the electrical and optical properties of organic semiconductor thin films. Using a combination of spectroscopic methods, including scanning near-field optical microscopy, we study the domain structure and packing quality of highly crystalline thin films of oligomeric PQT-12 with 100 nanometer spatial resolution. The pronounced optical anisotropy of these layers measured by polarized light microscopy facilitates the identification of regions with uniform molecular orientation. We find that a hierarchical order on three different length scales exists in these layers, made up of distinct well-ordered dichroic areas at the ten-micrometer-scale, which are sub-divided into domains with different molecular in-plane orientation. These serve as a template for the formation of smaller needle-like crystallites at the layer surface. A high degree of crystalline order is believed to be the cause of the rather high field-effect mobility of these layers of 10(-3) cm 2 V(-1) s(-1), whereas it is limited by the presence of domain boundaries at macroscopic distances.