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European partnership aims to develop next generation of highly efficient silicon thin-film solar modules

April 03, 2012 | Paul Buckley | 222904389
European partnership aims to develop next generation of highly efficient silicon thin-film solar modules Eighteen industrial and research partners have joined forces in an EU Fast Track project aiming to refine thin-film solar module technology. Within three years, the researchers plan to produce a marketable prototype with an efficiency of 12 percent.
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The project is coordinated by Forschungszentrum Jlich and funded to the tune of 9.3 million by the EU.

In recent years, various companies have increased the efficiency of marketable thin-film solar modules to the present level of ten percent. Although these modules are still not as efficient as conventional solar cells, they can be produced much more economically. In the case of thin-film modules, the silicon is applied to the substrate in a layer about one micrometer thick and does not need to be carefully cut out from expensive wafers. Thin-film silicon solar modules designed as tandem solar cells are particularly efficient. They consist of two layers one on top of the other, which absorb different fractions of sunlight.

Each of these two cell layers is divided into several sublayers which all influence each other in a complex manner. Since these interactions are difficult to predict, existing industrial thin-film solar cells make use of proven combinations of components and substrates. In the Fast Track project, leading representatives from research and industry who previously pursued different technologies are now pooling their expertise in order to combine the best components. By harmonizing and optimizing different approaches, a new generation of thin-film silicon solar modules will be created with an efficiency of twelve percent. This corresponds to an increase of twenty percent and under test conditions the costs should amount to less than 0.5 per watt nominal power
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