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Junghahnel M.,Fraunhofer Institute for Electron Beam and Plasma Technology
Vakuum in Forschung und Praxis

Flexible glass, such as ultra-slim Corning® Willow® Glass, produced at thicknesses lower than 200 micron has the ability to bend, while maintaining perfect barrier properties, superior surface quality, greater transparency, and high temperature processing, outperforming polymers. At the same time it has the potential to be used in roll-to-roll large area processing. These qualities make flexible glass an outstanding material for displays, touch panels, thin-film batteries and photovoltaic (PV) products. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA. Source

Weller S.,Fraunhofer Institute for Electron Beam and Plasma Technology
Vakuum in Forschung und Praxis

Ultra-fast thermal annealing of thin films with annealing times of few milliseconds are faster und more energy efficient than conventional furnace annealing methods. By using flash lamp annealing, only the surface is heated while the substrate remains cold. This allows the refinement of indium-tin-oxide films on rigid and ultra-thin flexible glass and improves their conductivity and transmittance. Copyright © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

Vacuum processing enables very precise thin-layer coating of surfaces with many different materials, which can not be used with other surface finishing processes, or they require very high expenditures and are therefore not economical. Almost all metals, as well as many alloys and inorganic compounds can be deposited by so called PVD processes (physical vapour deposition). Plasma-activated electron beam vapour deposition enables the economical manufacturing of high-value coatings at high deposition rates on large surfaces. Four examples of decorative and functional coatings on metal tapes are proving the potential of plasma-activated electron beam vapour deposition. Source

Beyer B.,Fraunhofer Institute for Electron Beam and Plasma Technology | Leo K.,TU Dresden
Journal of Materials Chemistry C

Top-absorbing organic solar cells with a light incoupling layer allowing the exposure of harmful UV irradiation have been fabricated. Short-wavelength light is absorbed by the down-shifting system Alq3:DCM located in the light incoupling layer of top-absorbing organic solar cells and is converted into longer wavelengths. This red light is then absorbed by a ZnPc:C60 bulk heterojunction solar cell, showing a total power efficiency increase by more than 10% related to additional photocurrent generated by this architectural concept. © The Royal Society of Chemistry 2015. Source

Muhl S.,Fraunhofer Institute for Electron Beam and Plasma Technology | Beyer B.,Fraunhofer Institute for Electron Beam and Plasma Technology

In recent years, both biodegradable and bio-based electronics have attracted increasing interest, but are also controversially discussed at the same time. Yet, it is not clear whether they will contribute to science and technology or whether they will disappear without major impact. The present review will address several aspects while showing the potential opportunities of bio-organic electronics. An overview about the complex terminology of this emerging field is given and test methods are presented which are used to evaluate the biodegradable properties. It will be shown that the majority of components of organic electronics can be substituted by biodegradable or bio-based materials. Moreover, application scenarios are presented where bio-organic materials have advantages compared to conventional ones. A variety of publications are highlighted which encompass typical organic devices like organic light emitting diodes, organic solar cells and organic thin film transistors as well as applications in the field of medicine or agriculture. © 2014 by the authors; licensee MDPI, Basel, Switzerland. Source

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