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Breaking News

Researchers Study Flexible and Transparent Coatings that Conduct Electricity

NEWS
November 8, 2013

SAARBRÜCKEN, Germany - Flexible displays, cost-efficient solar cells for a new era of energy production, futuristic lighting at home all require thin layers with specific properties. Scientists at the INM – Leibniz Institute for New Materials are exploring new routes to such coatings in NanoSPEKT, a project funded by the Federal Ministry of Education and Research (BMBF).

The researchers are aiming at flexible and transparent coatings that conduct electricity particularly well. They combine inorganic nanoparticles with polymers and rationally arrange the particles inside the composite. The research will lead to particle-containing inks and coating methods that yield thin films with improved properties at lower cost.

“Today, the structure of composite layers is random. It does not help to develop highly conductive particles for composites if they do not touch each other. The electrons have to tunnel through the gaps, and electric conductivity is lost,” says Tobias Kraus, head of the Structure Formation Group at INM. He and his colleagues strive to improve control of the distribution of the particles inside the layers.

It is already possible to coat large areas with conductive films, for example using so-called “roll-to-roll” production methods. The scientists at INM will use compatible methods to enable cost-efficient large-scale production. They are studying how the particles change in the composite during processing. “If we manage to pack the conductive nanoparticles more closely, the electrical conductivity of the film increases,” says the group leader. This may be achieved by gently sintering the particles inside the polymer.

The Federal Ministry of Education and Research (BMBF) will fund NanoSPEKT with 2.5 million euros. As a project in the framework of the funding initiative NanoMatFutur of the BMBF, NanoSPEKT will be initially supported for four years, a period that can be extended.

INM - Leibniz Institute for New Materials, situated in Saarbrücken, Germany, is one of the leading centers for materials research. It is a scientific partner to national and international institutes and a provider of research and development for companies throughout the world. INM is an institute of the Scientific Association Gottfried Wilhelm Leibniz and employs around 180 collaborators. Its main research fields are chemical nanotechnology, interface materials and materials in biology.

KEYWORDS: nanotechnology research

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