Modules with ultra-thin silicon solar cells
|German title:||Module mit ultradünnen Silizium-Solarzellen|
|Duration:||1st April 2011 - 31st December 2013|
|Description:||The primary goal of the joint project is to reduce the "specific" module costs (quotient of "costs / watt-peak output" [/Wp]). This can be achieved both by reducing production costs and by increasing the efficiency of the modules, although a combination of both measures is still being sought.
In order to reduce costs, careful studies are being carried out on material savings, especially concerning the choice of glass panes, embedding and sealing, and the support structure. Another focus will be on controlling the breakage rate in the ever accelerating module assembly with ever thinner solar cells.
By reducing optical and electrical losses, the aim is to increase module output by 1-2 % in absolute terms for a given cell output. The electrical conduction losses (lower series resistance) are to be reduced by using back-contacted cells while simultaneously increasing the cross-section of the conductive paths without further light shading. The second main objective of the project is to predict the expected service life of the modules and, by clarifying the failure mechanisms and their remedies and building on this, to extend the expected service life from 20-25 years today to 30 years.
The specific objectives of the sub-project xµ-Module-Qualification, xµ-MQ, of the CiS Forschungsinsti-tut für Mikrosensorik und Photovoltaik GmbH are to evaluate the research and development approaches for product and process innovations at an early stage - still in the technology phase - with regard to customer benefits. This is fundamentally about reliability and yield security in power generation during the service life of 30 years. On the one hand, this means that it must be possible to develop time-consuming test procedures and corresponding prognosis models, and on the other hand, the critical load cases must be identified from the extensive canon of standard tests in order to ensure rapid feedback to the developers through partial tests. Analogous tasks have been worked on for years in the verification of reliability and integration in microsystem technology. This know-how is to be used. The usefulness of these models for solar modules is to be evaluated and the result implemented in novel rapid test procedures. Reference and touchstone in the sense of a minimum requirement are the results of standard tests and free field tests. In addition to this method development, the existing testing facilities - testing equipment for standard testing for module approval, open-space test field, laboratory tests and analytics including metallography - will of course be made available to the collaborative partners.
|Partners:||Fraunhofer-Center für Silizium-Photovoltaik (CSP), Halle
Fraunhofer-Institut für Solare Energiesysteme (ISE), Freiburg
Q-Cells AG, Bitterfeld- Wolfen
SOLARWATT AG, Dresden
|Funded by:||Federal Ministry of Education & Research|
|Funding code:||03SF0400 C|
|Contact:||Contact us about this project via our former business unit Silicon Detectors|
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