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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 2: Molecular Electronics - organized by Derck Schlettwein (Justus Liebig University Giessen, Giessen)

CPP 2.11: Invited Talk

Monday, March 22, 2021, 14:00–14:40, CPPa

Small, but highly effective: Functional molecules in polymer devices — •Ulrike Kraft — Max Planck Institute for Polymer Research, Mainz, Germany

The incorporation of small functional molecules such as dopants, plasticisers or molecular switches into polymer films can strongly affect their properties and even induce additional functionalities. Here, two examples will be discussed in which small functional molecules significantly influence the (electronic) properties of polymer devices:

Firstly, intrinsically stretchable interconnects and electrodes are printed from conductive inks consisting of PEDOT:PSS and ionic additives. In this approach, the ionic additives act as dopants and plasticisers and film properties can be tuned by orders of magnitude.

Secondly, the bias stress stability of polymer transistor is significantly improved by the addition of specific functional molecules. While on-state bias stress stability is widely studied, the off-state bias stress is mostly overlooked, even though equally important. We close this gap, focus on the off-state bias stress stability and show that threshold voltage shifts can be remarkably reduced.