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
Linear potentiometer LRW2/3 - Maximum precision with many measuring points
17.05.2017 | WayCon Positionsmesstechnik GmbH
First flat lens for immersion microscope provides alternative to centuries-old technique
17.05.2017 | Harvard John A. Paulson School of Engineering and Applied Sciences
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.
In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
24.05.2017 | Physics and Astronomy
24.05.2017 | Physics and Astronomy
24.05.2017 | Event News