Berlin 2015 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 26: Organic electronics and photovoltaics: Transport of charges - from molecules to devices (CPP with HL/TT)

HL 26.10: Talk

Tuesday, March 17, 2015, 12:00–12:15, C 130

Investigation of semiconducting polymers with thermally cleavable side chains for application in multilayer devices I: Morphology and OFET devices. — •Janusz Schinke^1,2, Sabina Hillebrandt^2,3, Milan Alt^2,5, Torben Adermann^2,4, Tobias Glaser^2,3, Annemarie Pucci^2,3, Norman Mechau^2,5, Manuel Hamburger^2,4, Wolfgang Kowalsky^1,2, and Robert Lovrincic^1,2 — ¹TU Braunschweig, IHF, Germany — ²InnovationLab GmbH, Heidelberg, Germany — ³U. Heidelberg, KIP, Germany — ⁴U. Heidelberg, OCI, Germany — ⁵KIT, Germany

Conjugated polymers enable the production of electronic devices from solution at room temperature due to their advantageous combination of their electrical, optical and film-forming properties. A major milestone for this emerging technology consists in achieving printed multi-layer functional devices. A great challenge for printed organic electronics is to deposit the subsequent layer of a multilayer component from the same solvent without destroying the underlying freshly deposited layer. The solubility reduction of semiconducting molecules by the external stimulus of heat is the aim of our work. Novel organic semiconductors bearing thermally cleavable side chains were investigated via AFM, ellipsometry, PE spectroscopy and IR spectroscopy. Their charge transport characteristics were studied using OFETs. These methods allow us to obtain a clear understanding of the pyrolysis process and its influence on the resulting performance. We achieve very homogeneous layers after thermal treatment which exhibit excellent solvent resistance and additionally show an increase in OFET performance.