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Roll to Module processed Crystalline Silicon Thin-Films for higher than 20% efficient modules

Objective

The current technologies to produce photovoltaic modules exhibit features, which prevent cost-reduction to below 0,5€/Wp:
- Sawing/Wafering and Module assembly is costly and material intensive for wafer solar cells
- Efficiency is comparatively low for classical thin-film solar cells (CdTe, CIS, a-Si/µc-Si, dye, organic).
One approach to avoid both disadvantages is the so-called crystalline Si thin-film lift-off approach, where thin c-Si layers are stripped from a silicon wafer. This approach has the potential to reach > 20% efficient solar cells, however handling issues stop quick progress so far.
The basic idea of the current project is to enable the use of lift-off films in a nearly handling-free approach, to avoid limitations by handling issues.
The technological realization has the following key features and steps:
- Continuous separation of a very thin (< 10 µm) c-Si foil from the circumference of a monocrystalline silicon ingot
- Attachment to a high-temperature stable substrate of large area (e.g. graphite, Sintered Silicon, or ceramics), which can also serve as module back side.
- High-temperature re-organisation of the silicon foil followed by in-situ epitaxial thickening (~40 µm base thickness) in an in-line chemical vapour deposition reactor, including pn-junction formation
- Processing of high-efficiency solar cells and formation of integrated interconnected high-voltage modules
- Encapsulating into a module (glass / encapsulant only if needed)
The resulting module to be demonstrated in R2M-Si has a cost potential around 0.55 €/Wp, at 18% module efficiency and thus low Balance-of-System cost. Future enhanced R2M-Si modules can exceed even 20% efficiency, at costs below 0.5 €/Wp.
The project shall demonstrate the feasibility of the most critical process steps like continuous layer detachment, bonding to a carrier substrate, high-quality epitaxy, handling-free solar cell processing and module integration. As a deliverable, a mini module of higher than 18% efficiency shall be prepared.

Field of science

  • /natural sciences/chemical sciences/inorganic chemistry/inorganic compounds

Call for proposal

FP7-ENERGY-2010-FET
See other projects for this call

Funding Scheme

CP - Collaborative project (generic)

Coordinator

FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Address
Hansastrasse 27C
80686 Munchen
Germany
Activity type
Research Organisations
EU contribution
€ 890 318,75
Administrative Contact
Maximilian Steiert (Mr.)

Participants (6)

INTERUNIVERSITAIR MICRO-ELECTRONICA CENTRUM
Belgium
EU contribution
€ 604 611,75
Address
Kapeldreef 75
3001 Leuven
Activity type
Research Organisations
Administrative Contact
Christine Van Houtven (Ms.)
STIFTELSEN SINTEF
Norway
EU contribution
€ 367 541
Address
Strindveien 4
7034 Trondheim
Activity type
Research Organisations
Administrative Contact
Tove Lillian Hønstad (Ms.)
IOFFE PHYSICO-TECHNICAL INSTITUTE OF THE RUSSIAN ACADEMY OF SCIENCES
Russia
EU contribution
€ 165 700,80
Address
26 Polytekhnicheskaya
194021 St Petersburg
Activity type
Research Organisations
Administrative Contact
Ekaterina Astrova (Dr.)
UNIVERSITAT KONSTANZ
Germany
EU contribution
€ 442 912,40
Address
Universitatsstrasse 10
78464 Konstanz
Activity type
Higher or Secondary Education Establishments
Administrative Contact
Claudia Knüppel (Ms.)
S'TILE SA
France
EU contribution
€ 141 923
Address
Rue Marcel Pagnol 6
86180 Buxerolles
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Administrative Contact
Alain Straboni (Prof.)
RENA GMBH
Germany
EU contribution
€ 221 917,50
Address
Ob Der Eck 5
78148 Guetenbach
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Administrative Contact
Petra Leidisch (Ms.)