1. +49‐7071‐2976333+49‐7071‐295110;2. Institut für Angewandte Physik, Universit?t Tübingen, Tübingen, Germany;3. Cavendish Laboratory, University of Cambridge, Cambridge, UK;4. Central European Institute of Technology and Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Brno, Czech Republic
Abstract:
Binary mixed thin films of picene (C22H14, PIC) and pentacene (C22H14, PEN) consist of crystallites with a statistical occupation of the lattice sites by either PEN or PIC and unit cell parameters continuously changing with the mixing ratio. For high PIC ratios a PIC phase forms which corresponds to a limited intermixing of the two compounds. The growth behavior of these mixtures is investigated in situ and in real‐time using grazing incidence X‐ray diffraction. We observe a delayed phase separation in PIC‐rich blends, i.e. complete intermixing in the monolayer range and the nucleation of a pure PIC‐phase in addition to the intermixed phase starting from the second monolayer.
Growth scenario of picene‐rich pentacene‐picene blends.
