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Improved material quality and light trapping in thin film silicon solar cells

Objective

In this project we will increase the efficiency of thin-film silicon solar cells on flexible substrates by solving the issues linked to material quality, interface properties and light management, thus enabling lower production costs per Watt-peak. The general technological objectives of the project are the development of better materials and enhanced interfaces for thin film silicon solar cells, and to transfer the developed processes to an industrial production line. The most important project goals are: 1) Reduction of optical reflection and parasitic absorption losses: Design and industrial implementation of textured back contacts in flexible thin film silicon solar cells. 2) Reduction of recombination losses: Development and implementation of improved silicon absorber material. 3) Reduction of electric losses: Graded TCO layers which minimize the work function barrier between the p-layer and the TCO layer without loss of conductivity and transmission of the TCO. In addition, the top layer of the TCO stack should provide a good protection against moisture ingression. In order to achieve these objectives more in-depth knowledge is needed for several relevant key areas for thin film silicon solar cells. The main scientific objectives are: 1) Identification of the ideal texture for the back contact. This structure should maximize the light trapping in thin film silicon solar cells without deterioration of open-circuit voltage and fill factor. 2) Paradigm shift for the growth of microcrystalline silicon. In this project we want to show that it is possible to use microcrystalline silicon with high crystalline fractions leading to better current collection without voltage losses, and without crack formation when grown on nano-textured substrates. 3) Deeper understanding of moisture degradation mechanisms of common TCO’s like ITO and AZO.

Call for proposal

FP7-ENERGY-2009-1
See other projects for this call

Coordinator

STICHTING ENERGIEONDERZOEK CENTRUM NEDERLAND
Address
Westerduinweg 3
1755 LE Petten
Netherlands
Activity type
Research Organisations
EU contribution
€ 1 409 142
Administrative Contact
Wim J. Soppe (Dr.)

Participants (9)

ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE
Switzerland
EU contribution
€ 866 500
Address
Batiment Ce 3316 Station 1
1015 Lausanne
Activity type
Higher or Secondary Education Establishments
Administrative Contact
Vanessa Terrazzoni (Dr.)
VHF-TECHNOLOGIES SA
Switzerland
EU contribution
€ 1 074 000
Address
Rue Edouard Verdon 2
1400 Yverdon Les Bains
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Administrative Contact
Diego Fischer (Ms.)
DANMARKS TEKNISKE UNIVERSITET

Participation ended

Denmark
EU contribution
€ 187 600
Address
Anker Engelundsvej 1 Bygning 101 A
2800 Kgs Lyngby
Activity type
Higher or Secondary Education Establishments
Administrative Contact
Rafal E. Dunin.Borkowski (Prof.)
Nanoptics GmbH
Germany
EU contribution
€ 763 300
Address
Innungsstrasse 5
21244 Buchholz
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Administrative Contact
Wilfried Schipper (Mr.)
UNIVERZA V LJUBLJANI
Slovenia
EU contribution
€ 324 900
Address
Kongresni Trg 12
1000 Ljubljana
Activity type
Higher or Secondary Education Establishments
Administrative Contact
Janez Krc (Dr.)
UNIVERSITAT POLITECNICA DE VALENCIA
Spain
EU contribution
€ 338 718,75
Address
Camino De Vera Sn Edificio 3A
46022 Valencia
Activity type
Higher or Secondary Education Establishments
Administrative Contact
José Antonio Pérez García (Mr.)
Umicore Materials AG
Liechtenstein
EU contribution
€ 530 544
Address
Alte Landstrasse 8
9496 Balzers
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Administrative Contact
Bruno Hofer (Mr.)
SHANGHAI JIAO TONG UNIVERSITY
China
EU contribution
€ 150 814,80
Address
Huashan Road 1954
200030 Shanghai
Activity type
Higher or Secondary Education Establishments
Administrative Contact
Qingkang Wang (Prof.)
FORSCHUNGSZENTRUM JULICH GMBH
Germany
EU contribution
€ 134 000
Address
Wilhelm Johnen Strasse
52428 Julich
Activity type
Research Organisations
Administrative Contact
Gelinde Riese (Ms.)