With PEDOT (poly(3,4-ethylenedioxythiophene)) - available under the trade name Clevios™ - Heraeus has developed the latest generation of conductive polymers which are characterized by outstanding properties:
- High conductivity
- High transparency
- High stability
- Easy processing
For high conductive coatings Clevios™ PH 1000, stabilized Clevios™ F 100T, or its ready to use formulation, Clevios™ FE-T can be used. These materials offer not only high conductivities but also exceptional levels of transparency.
A conductivity of 900-1000 S/cm can be reached by using Clevios™ PH 1000 together with a conductivity enhancement agent such as DMSO or ethylene glycol. The ready to use formulation CLEVIOS™ FE-T is water-based and contains a polymer binder, wetting agent etc. to ensure good processing, adhesion to the substrate and mechanical strength.
Coating formulations have been optimized for individual substrates, such as A-PET, PET, polycarbonate, glass for different wet film thicknesses and surface resistivities.
Coating can be achieved by standard printing processes, such as slit die, Inkjet, screen or gravure methods. Also brushing, spraying, spin-coating or roller coating can be used.
Clevios™ F DX2 / Clevios X-L is the latest addition to the family of highly conductive Clevios™ formulations. It’s a two component hard-coat formulation that provides good chemical and scratch resistance in addition to low sheet resistance and high transmissions.
One of the most exciting topics in current display development are foldable and rollable touch displays. As Clevios™ is an organic polymer material, it is intrinsically flexible and can even be stretched or 3-D thermoformed. Together with ITRI in Taiwan, Heraeus has developed the world first prototype of a flexible AMOLED with an out-cell foldable touch panel based on Clevios. Publications with more information can be found in the touch panel download section.