High-efficiency solar cells on ultra-thin silicon wafers
|German title:||Hocheffiziente Solarzellen auf ultradünnen Silizium-Wafern|
|Duration:||1st April 2011 - 31st December 2013|
|Description:||Meeting the challenges of the global photovoltaic market requires cross-sector cooperation of the German solar industry. The main objective of the project is therefore to coordinate and strengthen the pre-competitive research and development activities of the most important companies and institutes in central Germany, which contribute to the innovation and further development of equipment and processes for the production of silicon solar cells in the photovoltaic value chain. It thus includes the organization of a targeted cooperation of cell producers with module manufacturers and supplier companies that produce the handling and processing equipment. The consortium is strengthened by scientists and engineers in the solar institutes of the Fraunhofer Society in Freiburg (ISE) and Halle (CSP) and in the solar center of the CiS in Erfurt (SZE).
The primary goal of this project consortium is to reduce the specific cell costs, i.e. the cell cost/peak power ratio [/Wp], to such an extent that the cluster goal "Grid Parity 2013" is achieved, i.e. that in 2013 the market price for photovoltaic modules is 33% lower than in 2010. This can be achieved both by reducing the production costs and by increasing the efficiency, which determines the maximum power produced per cell or module. Even more effective, of course, is the combination of both measures, i.e. the production of more efficient solar cells on thinner wafers. However, it is important that the achieved cost savings in cell production actually contribute to the reduction of module prices, i.e. that they are not compensated by higher breakage rates or higher costs in module integration.
The CiS Forschungsinstitut für Mikrosensorik und Photovoltaik GmbH is involved in these topics with various investigations in cell processing and characterization. In this context, work is carried out that is aimed at processing thin wafers as well as techniques for processing high-efficiency solar cells. This work mainly includes:
- the testing and development of wet chemical cleaning techniques that are less expensive but similarly efficient or even better than currently existing alternatives,
- the investigation of local metallizations based on electrodeposits for targeted fine contacting
- the definition of the contact point between the solar cell and the connector medium during module integration with regard to size, position, shape and surface condition in order to create an optimal (cost-effective and long-term stable) connection process based on soldering or bonding techniques,
- the production of demonstrators (partially and fully processed functional samples) based on the developed concepts, in cooperation with the project partners,
- the characterization of demonstrators on the one hand for their optical and electrical properties and on the other hand also for the yield behavior of solar cells (also under low-light conditions), without building a complete solar module,
- Investigation of the PID effect: influence of the anti-reflective layer on its PID properties can be investigated.
|Partners:||Bosch Solar Energy AG
Jonas & Redmann
Roth & Rau AG
Schott Solar GmbH
Fraunhofer AG, CSP (Halle)
Fraunhofer AG, ISE (Freiburg)
|Project sponsor:||Projektträger Jülich|
|Contact:||Contact us about this project via our former business unit Silicon Detectors|
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