Nanomorphology in thin films of acetamide end-functionalised quaterthiophene

Journal article

Publication Details

Author(s): Zeilmann N, Rösner B, Späth A, Schmidt U, Fink R
Journal: Thin Solid Films
Publication year: 2015
Volume: 583
Pages range: 108-114
ISSN: 0040-6090


α,ω-Functionalised oligothiophenes are promising materials for organic field effect transistors due to their high degree of molecular ordering, crystallinity and π-π stacking. We employ several complementary microspectroscopic probes to investigate the formation of thermally evaporated films of 5,5‴-bis(N-acetamido-2-ethyl)-2,2′:5′,2″:5″,2‴quaterthiophene on inert substrates. These films were found to grow in a mixed fashion, featuring layer-by-layer domains with thicknesses of several monolayers and needle-shaped three-dimensional crystals. Detailed analysis of atomic force microscopy (AFM) and photoluminescence microscopy reveals the micro- and nanomorphology of the films. Linear dichroism in the near edge x-ray absorption fine structure and polarisation-dependent laser excitation corroborate the findings of AFM, i.e., upright standing molecules in the multilayer regime. The shape of the 3-dimensional crystallites and multilayer domains indicates strongly anisotropic growth favoured by the herringbone-arrangement of the thiophene moieties and additional stabilisation by hydrogen bonding of the acetamide end groups.

FAU Authors / FAU Editors

Fink, Rainer Prof. Dr.
Professur für Physikalische Chemie
Rösner, Benedikt
Lehrstuhl für Physikalische Chemie II
Späth, Andreas Dr.
Lehrstuhl für Physikalische Chemie II
Zeilmann, Nina Dr.
Lehrstuhl für Physikalische Chemie II

Additional Organisation
Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

External institutions with authors

WITec Wissenschaftliche Instrumente und Technologie GmbH

How to cite

Zeilmann, N., Rösner, B., Späth, A., Schmidt, U., & Fink, R. (2015). Nanomorphology in thin films of acetamide end-functionalised quaterthiophene. Thin Solid Films, 583, 108-114.

Zeilmann, Nina, et al. "Nanomorphology in thin films of acetamide end-functionalised quaterthiophene." Thin Solid Films 583 (2015): 108-114.


Last updated on 2019-03-06 at 17:08

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