Colloid and Polymer Science

, Volume 282, Issue 8, pp 932–938 | Cite as

Semicrystalline morphology in thin films of poly(3-hexylthiophene)

  • S. Hugger
  • R. Thomann
  • T. Heinzel
  • T. Thurn-Albrecht
Original Contribution

Abstract

The thermodynamic phase behavior and the morphology in thin films of poly(3-hexylthiophene) (P3HT) has been studied using calorimetry, X-ray scattering, and scanning force microscopy (AFM). Around 225 °C a phase transition from the crystalline state to a layered, liquid crystalline structure occurs in regioregular P3HT, while the regiorandom counterpart material is disordered at all temperatures and displays a glass transition temperature Tg≈−3 °C. Regioregular P3HT is semicrystalline and forms needle or plate like crystallites which in solution cast thin films are oriented with respect to the substrate. Films produced by spin coating display a non-equilibrium structure with reduced order and orientation. Annealing of these films in the liquid crystalline state leads to the formation of a morphology similar to the one observed in solution cast films.

Keywords

Semicrystalline morphology Thin films Poly(3-hexylthiophene) Thermodynamics Phase behavior Morphology Crystals 

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Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • S. Hugger
    • 1
  • R. Thomann
    • 2
  • T. Heinzel
    • 1
  • T. Thurn-Albrecht
    • 3
  1. 1.Physikalisches InstitutAlbert-Ludwigs-Universität FreiburgFreiburgGermany
  2. 2.Freiburger Materialforschungszentrum und Institut für Makromolekulare ChemieAlbert-Ludwigs-Universität FreiburgFreiburg
  3. 3.Fachbereich PhysikMartin-Luther-Universität Halle-WittenbergHalleGermany

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