Process for selective ablation of a silicon nitride layer on a silicon wafer.
Fraunhofer ILT, Aachen
Silicon-based thin-film module, structured using laser radiation.
Fraunhofer ILT, Aachen
Fraunhofer ILT will be presenting the demonstrator of this polygon scanner to a professional audience at the joint Fraunhofer booth in Hall 3/G22 at the European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC, in Frankfurt from September 24 – 28, 2012. Combined with modern beam sources working at high repetition rates, the polygon scanner can significantly increase production throughput. It can be used for processing both thin-film solar modules and crystalline solar cells.Series connection for rigid and flexible solar modules
The challenge ILT researchers now face is to do this without impairing the functionality of the layers of conducting, semi-conducting, or insulating materials, which have thicknesses ranging from a few nanometers to a few micrometers. If, for example, residues of ablated material or thermal damage to neighboring areas occur during processing, the extreme thinness of these layers can lead to their degradation and cause the entire solar module not to work. The laser structuring processes therefore have to be adapted to the different characteristics of each individual layer. Ultrashort pulse lasers can be used for physical processes that are not feasible at longer pulse durations. This opens up new process windows, and paves the way towards new industrial-scale processes.In the FlexLas project, funded by the European Commission and the state government of North Rhine-Westphalia, a laser structuring technique for organic solar cells on flexible film substrates is being developed at Fraunhofer ILT. This type of solar module is considered an economical, forward-looking product in the field of solar energy. It might well be possible one day to make textiles or handbags with flexible solar cells, which could be used to charge a cell phone. The laser structuring processes being developed in Aachen can also be applied to other products with multiple-layer systems, such as smart phone screens and flat lighting elements.
Using the right beam source here can significantly improve the production process. ILT researchers are currently testing a variety of different beam sources in order to fulfill the widest possible range of parameters relating to pulse duration, wavelength, process-adapted intensity distribution, etc. while minimizing laser-related damage.
Axel Bauer | Fraunhofer-Institut
Dresdner scientists print tomorrow’s world
08.02.2017 | Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS
New technology for mass-production of complex molded composite components
23.01.2017 | Evonik Industries AG
In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport
Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...
The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...
Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
13.02.2017 | Event News
10.02.2017 | Event News
09.02.2017 | Event News
24.02.2017 | Earth Sciences
24.02.2017 | Agricultural and Forestry Science
24.02.2017 | Life Sciences