Such solar cells would allow those parts of a building that have been unused up to now to be exploited for the generation of electrical energy – including industrial flat roofs, facades or large window areas.
Encapsulation films for flexible solar cells will be adapted to environmental conditions such as UV-radiation in the »flex25« project.
Buildings have so far been used only by a small percentage to produce energy. But facades, window panes, sunshades or flat roofs offer huge open spaces in which photovoltaic modules could be integrated.
It is expected that up to 50 percent of the energy demand could be satisfied with building-integrated photovoltaics (BIPV) in the long term. Thin-film photovoltaics open up whole new ways of integrating photovoltaic elements in the building envelope on account of their flexibility, low weight and the possibility of adjusting different levels of transparency and colors.
But flexible solar cells to date often lack weathering-resistance and a satisfactory service lifetime. The active layers within a thin-film solar module in particular are very sensitive to water-vapor and oxygen and have to be given the best possible protection against ambient conditions.
The Fraunhofer Institutes for Electron Beam and Plasma Technology FEP, for Silicate Research ISC and for Process Engineering and Packaging IVV, have already developed layer systems and production processes in multi-annual research projects which allow flexible electronic products such as organic light-emitting diodes (OLEDs) or displays to be very effectively protected against water-vapor and oxygen. The technology developed by the scientists currently achieves one of the lowest water-vapor permeability values for roll-to-roll produced systems in the world.
In order to make the proven layer system suitable for outdoor applications, such as its use in flexible solar modules, the scientists are aiming to improve the UV- and weathering-resistance of the encapsulating film within the frame of the »flex25« project (reference number: 03V0224, duration: 3 years) which is being supported within the scope of the BMBF-grant »Validation of the innovative potential of scientific research – VIP«. The technology will be transferred to a weathering- and UV- resistant substrate and the resistance of the layer materials themselves to environmental impacts such as UV-radiation will be improved. The group will hereby exploit its experience in the field of photovoltaics and front side encapsulation. The ultimate aim of this project is the roll-to-roll production of a lightweight, long-term stable front encapsulation of flexible thin-film solar cells with a service lifetime of 25 years.
Currently an encapsulation film that is suitable for outdoor applications is not available anywhere in the world. However, such a film would be a key enabling technology for building-integrated photovoltaics. If the front glass of a typical solar module could be replaced by a polymer film, for example, its weight might be reduced by up to 40 percent and roofs or building parts with limited bearing load of the construction such as industrial flat roofs could be used for photovoltaics.Press contact:
Winterbergstraße 28 | 01277 Dresden | Gemany | www.fep.fraunhofer.de
Annett Arnold | Fraunhofer-Institut
Further reports about: > Immunoaffinitätschromatographie > building-integrated photovoltaics > electrical energy > environmental impact > flexible electronic products > light-emitting diode > long-term stable solar film > organic light-emitting diode > production process > solar cell > weathering-resistance
Organic-inorganic heterostructures with programmable electronic properties
30.03.2017 | Technische Universität Dresden
Researchers use light to remotely control curvature of plastics
23.03.2017 | North Carolina State University
The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.
To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
30.03.2017 | Health and Medicine
30.03.2017 | Health and Medicine
30.03.2017 | Medical Engineering