Physics Colloquium, Emil J.W. List-Kratochvil, Institut für Physik, Institut für Chemie & IRIS Adlershof, Berlin / Helmholtz-Zentrum für Materialien und Energie GmbH, HySPRINT Helmholtz Innovation Lab, Berlin

Abstact:

Beyond the use in home and office-based printers, inkjet printing (IJP) has become a popular structuring and selective deposition technique across many industrial sectors. More recently great interest also exists in new industrial areas like in the manufacturing of printed circuit boards, solar cells, flexible organic electronic and medical products. In all these cases IJP allows for a flexible (digital), additive, selective and cost-efficient material deposition, which can be used in an in-line production process. Due to these advantages, there is the prospect that up to now used standard processes can be replaced through this low cost innovative material deposition technique. However, using IJP as a production process in manufacturing, beyond the use in research laboratories, still requires rigorous development of cost and performance optimised functional electronic inks and processes, in particular those allowing for the fabrication on low cost flexible substrates polyethylene terephthalate. By this means this important aspect also addresses the trend in industry for high-throughput, roll-to-roll device processing, where the use of common plastic substrates instead of glass poses problems concerning the thermal stability of the substrate and the mechanical stability of the deposited device layers, including the transparent conductive electrode (TCEs) against damages caused by substrate bending during the production and operation lifetime of the flexible devices. In this contribution we report on the design, realisation and characterization of novel low temperature processes for printed metals, active and passive IJP electronic devices on flexible low cost substrates. We will present examples of resistive memories, conventional and printed TCEs and related electrode structures for organic light emitting diodes and organic and hybrid solar cells based on IJP. [1]

[1] F. Hermerschmidt, S. A. Choulis, E. J. W. List ‐ Kratochvil, "Implementng Inkjet ‐ Printed Transparent Conductive Electrodes in Solution ‐ Processed Organic Electronics" , Adv. Mater. Technol. (2019) 1800474.