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Large grained, low stress multi-crystalline silicon thin film solar cells on glass by a novel combined diode laser and solid phase crystallization process

Objective

HIGH-EF will provide the silicon thin film photovoltaic (PV) industry with a unique process allowing for high solar cell efficiencies (potential for >10%) by large, low defective grains and low stress levels in the material at competitive production costs. This process is based on a combination of melt-mediated crystallization of an amorphous silicon (a-Si) seed layer (<500 nm thickness) and epitaxial thickening (to >2 µm) of the seed layer by a solid phase crystallization (SPC) process. Melting the a-Si layer and solidifying large grains (about 100 µm) will be obtained by scanning a beam of a diode laser array. Epitaxial thickening of the large grained seed layer (including a pn-junction) is realized by deposition of doped a-Si atop the seed layer and a subsequent SPC process by way of a furnace anneal. Such a combined laser-SPC process represents a major break-through in silicon thin film photovoltaics on glass as it will substantially enhance the grain size and reduce the defect density and stress levels of multi-crystalline thin layers on glass compared e.g. to standard SPC processes on glass, which provide grains less than 10 µm in diameter with a high density of internal extended defects, which all hamper good solar cell efficiencies. It is, however, essential for the industrial laser-SPC implementation that such a process will not be more expensive than the established pure SPC process. A low cost laser processing will be developed in HIGH-EF using highly efficient laser diodes, combined to form a line focus that allows the crystallization of an entire module (e.g. 1.4 m x 1 m in the production line or 30 cm x 39 cm in the research line) within a single scan. Specific attention has been given to identify each competence needed for the success of the project and to identify the relevant partners forming a balanced, multi-disciplinary consortium gathering 7 organizations from 4 different member states with 1 associated country.

Field of science

  • /humanities/arts/modern and contemporary art/film
  • /natural sciences/chemical sciences/inorganic chemistry/inorganic compounds
  • /engineering and technology/environmental engineering/energy and fuels/renewable energy/solar energy
  • /natural sciences/physical sciences/optics/laser physics

Call for proposal

FP7-ENERGY-2007-1-RTD
See other projects for this call

Funding Scheme

CP-FP - Small or medium-scale focused research project

Coordinator

LEIBNIZ-INSTITUT FUER PHOTONISCHE TECHNOLOGIEN E.V.
Address
Albert Einstein Strasse 9
07745 Jena
Germany
Activity type
Research Organisations
EU contribution
€ 550 780
Administrative Contact
Frank Sondermann (Mr.)

Participants (7)

CSG SOLAR AG
Germany
EU contribution
€ 211 340
Address
Sonnenallee
06766 Thalheim
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Administrative Contact
Jens Schneider (Dr.)
OCLARO SWITZERLAND GMBH
Switzerland
EU contribution
€ 650 348
Address
Binzstrasse 17
8045 Zurich
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Administrative Contact
Bruno Hoefliger
HORIBA FRANCE SAS
France
EU contribution
€ 334 780
Address
Rue Du Canal 16-18
91160 Longjumeau
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Administrative Contact
Lydie Vinot (Ms.)
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS
France
EU contribution
€ 272 554
Address
Rue Michel Ange 3
75794 Paris
Activity type
Research Organisations
Administrative Contact
Denis Fix (Mr.)
EIDGENOSSISCHE MATERIALPRUFUNGS- UND FORSCHUNGSANSTALT
Switzerland
EU contribution
€ 479 078
Address
Ueberlandstrasse 129
8600 Dubendorf
Activity type
Higher or Secondary Education Establishments
Administrative Contact
Johann Michler (Dr.)
AYMING
France
EU contribution
€ 98 180
Address
185 Avenue Des Gresillons
92622 Gennevilliers Cedex
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Administrative Contact
Nicolas Marin (Mr.)
MUSZAKI FIZIKAI ES ANYAGTUDOMANYI KUTATOINTEZET - MAGYAR TUDOMANYOS AKADEMIA
Hungary
EU contribution
€ 267 500
Address
Konkoly Thege Miklos Ut 29-33
1121 Budapest
Activity type
Higher or Secondary Education Establishments
Administrative Contact
Vera Somogyi (Ms.)