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Application relevant validation of c-Si based tandem solar cell processes with 30 % efficiency target

Objective

Crystalline silicon wafer solar cells have been dominating the photovoltaic market so far due to the availability and stability of c-Si and the decades of Si technology development. However, without new ways to improve the conversion efficiencies further significant cost reductions will be difficult and the c-Si technology will not be able to maintain its dominant role. In the SiTaSol project we want to increase conversion efficiencies of c-Si solar cells to 30 % by combining it with III-V top absorbers. Such a tandem solar cell will result in huge savings of land area and material consumption for photovoltaic electricity generation and offers clear advantages compared to today’s products. The III-V/Si tandem cell with an active Si bottom junction with one front and back contact is a drop-in-replacement for today’s Si flat plate terrestrial PV. To make this technology cost competitive, the additional costs for the 2-5 µm Ga(In)AsP epitaxy and processing must remain below 1 €/wafer to enable module costs <0.5 €/Watt-peak. It is the intention of the SiTaSol project to evaluate processes which can meet this challenging cost target and to proof that such a solar cell can be produced in large scale. Key priorities are focused on the development of a new growth reactor with efficient use of the precursor gases, enhanced waste treatment, recycling of metals and low cost preparation of the c-Si growth substrate. High performance devices will be demonstrated in an industrial relevant environment. The project SiTaSol approaches these challenges with a strong industrial perspective and brings together some of the most well-known European partners in the field of Si PV and III-V compound semiconductors. Furthermore SiTaSol will support the competitiveness of the European industry by providing innovative solutions for lowering manufacturing costs of III-V materials which are essential in today’s electronic products including laptops, photonic sensors and light emitting diodes.

Call for proposal

H2020-LCE-2016-2017

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Sub call

H2020-LCE-2016-RES-CCS-RIA

Coordinator

FRAUNHOFER GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG EV
Net EU contribution
€ 1 197 668,75
Address
Hansastrasse 27c
80686 Munchen
Germany

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Region
Bayern Oberbayern München, Kreisfreie Stadt
Activity type
Research Organisations
Non-EU contribution
€ 0,00

Participants (6)

TOPSIL GLOBALWAFERS AS
Denmark
Net EU contribution
€ 550 000,00
Address
Siliciumvej 1
3600 Frederikssund

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Region
Danmark Hovedstaden Nordsjælland
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Non-EU contribution
€ 0,00
AIXTRON LIMITED
United Kingdom
Net EU contribution
€ 325 000,00
Address
Anderson Road Buckingway Business Park Swavesey
CB24 5FQ Cambridge

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Region
East of England East Anglia Cambridgeshire CC
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Non-EU contribution
€ 0,00
AIXTRON SE
Germany
Net EU contribution
€ 1 094 933,75
Address
Dornkaulstrasse 2
52134 Herzogenrath

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Region
Nordrhein-Westfalen Köln Städteregion Aachen
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Non-EU contribution
€ 0,00
JOANNEUM RESEARCH FORSCHUNGSGESELLSCHAFT MBH
Austria
Net EU contribution
€ 549 940,00
Address
Leonhardstrasse 59
8010 Graz

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Region
Südösterreich Steiermark Graz
Activity type
Research Organisations
Non-EU contribution
€ 0,00
AZUR SPACE SOLAR POWER GMBH
Germany
Net EU contribution
€ 300 000,00
Address
Theresienstrasse 2
74072 Heilbronn

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Region
Baden-Württemberg Stuttgart Heilbronn, Stadtkreis
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Non-EU contribution
€ 0,00
UNIVERSITEIT LEIDEN
Netherlands
Net EU contribution
€ 280 658,75
Address
Rapenburg 70
2311 EZ Leiden

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Region
West-Nederland Zuid-Holland Agglomeratie Leiden en Bollenstreek
Activity type
Higher or Secondary Education Establishments
Non-EU contribution
€ 0,00