NANOSPEC

Nanomaterials for harvesting sub-band-gap photons via upconversion to increase solar cell efficiencies

Coordinatore	FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V    more  Organization address address: Hansastrasse 27C city: MUENCHEN postcode: 80686 contact info Titolo: Mr. Nome: Maximilian Cognome: Steiert Email: send email Telefono: +49 89 1205 2721 Fax: +49 89 1205 7534
Nazionalità Coordinatore	Germany [DE]
Sito del progetto	http://www.nanospec.eu/
Totale costo	3˙994˙486 €
EC contributo	3˙033˙843 €
Programma	FP7-NMP Specific Programme "Cooperation": Nanosciences, Nanotechnologies, Materials and new Production Technologies
Code Call	FP7-NMP-2009-SMALL-3
Funding Scheme	CP-FP
Anno di inizio	2010
Periodo (anno-mese-giorno)	2010-06-01   -   2013-05-31

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V  Organization address address: Hansastrasse 27C city: MUENCHEN postcode: 80686 contact info Titolo: Mr. Nome: Maximilian Cognome: Steiert Email: send email Telefono: +49 89 1205 2721 Fax: +49 89 1205 7534	DE (MUENCHEN)	coordinator	739˙359.50
2	HERIOT-WATT UNIVERSITY  Organization address address: Riccarton city: EDINBURGH postcode: EH14 4AS contact info Titolo: Dr. Nome: Eva Cognome: Olszewska-Day Email: send email Telefono: +44 131 4513073 Fax: +44 131 4513193	UK (EDINBURGH)	participant	588˙684.00
3	UNIVERSITEIT UTRECHT  Organization address address: Heidelberglaan 8 city: UTRECHT postcode: 3584 CS contact info Titolo: Ms. Nome: Herminia Cognome: Erasmo Email: send email Telefono: +31 30 2532614 Fax: +31 30 2531645	NL (UTRECHT)	participant	465˙314.00
4	TECHNION - ISRAEL INSTITUTE OF TECHNOLOGY  Organization address address: TECHNION CITY - SENATE BUILDING city: HAIFA postcode: 32000 contact info Titolo: Mr. Nome: Jack Cognome: Lavan Email: send email Telefono: +972 4 8293097 Fax: +972 4 829 3097	IL (HAIFA)	participant	443˙260.00
5	FORSCHUNGSZENTRUM JUELICH GMBH  Organization address address: Leo-Brandt-Strasse city: JUELICH postcode: 52425 contact info Titolo: Mr. Nome: Volker Cognome: Marx Email: send email Telefono: 492462000000 Fax: 492462000000	DE (JUELICH)	participant	352˙017.00
6	UNIVERSITAET BERN  Organization address address: Hochschulstrasse 4 city: BERN postcode: 3012 contact info Titolo: Dr. Nome: Karl Cognome: Krämer Email: send email Telefono: +41 31 631 4248 Fax: +41 31 631 4322	CH (BERN)	participant	202˙791.00
7	TECHNISCHE UNIVERSITEIT EINDHOVEN  Organization address address: DEN DOLECH 2 city: EINDHOVEN postcode: 5612 AZ contact info Titolo: Dr. Nome: Laurent (L.N.I.H.) Cognome: Nelissen Email: send email Telefono: 31402473000	NL (EINDHOVEN)	participant	152˙197.00
8	PHILIPS ELECTRONICS NEDERLAND B.V.  Organization address address: Boschdijk 525 city: EINDHOVEN postcode: 5621JG contact info Titolo: Mr. Nome: Patrick Cognome: Keur Email: send email Telefono: 31402740361 Fax: +31 402746321	NL (EINDHOVEN)	participant	90˙220.50

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 Obiettivo del progetto (Objective)

'To continue the path of cost reduction in photovoltaics the efficiency of silicon solar cells must be increased. With higher efficiencies more kWh can be produced from the same amount of silicon, which is the dominating cost factor at present. Fundamental loss mechanisms limit the maximum achievable efficiency: around 20% of the incident power is lost, because photons with energies below the band-gap are transmitted. Upconversion of two low energy photons into one usable photon reduces these losses. In this project we will realize upconversion with the help of nanostructures and nanotechnoloy-based materials and show a significant improvement in solar cell efficiency. The combination of upconverting Er-based phosphors with PbSe/PbS core shell quantum dots increases the spectral range of light that is upconverted. The quantum dots will be incorporated into a fluorescent concentrator to achieve concentration within the upconverting device. Both the increased photon flux due to a wider spectral collection and the additional geometric concentration will increase upconversion efficiency because of its nonlinear characteristic. Optical nanostructures shall serve as selectively reflective structures that avoid unwanted parasitic absorption. The development of very efficient quantum dots and suitable host materials, the optimization of the upconverter and the fabrication of photonic structures are main objectives. Additionally, solar cells and system designs will be optimized, to make the best use of upconverted photons. A thorough understanding of the underlying principles is critical for the success, so gaining knowledge about nanostructures and materials is a major goal. The big advantage of this concept is that the solar cells remain fairly unchanged. The proposed concept opens a technology path for an evolutionary development of silicon solar cell technology to efficiencies towards 30%, starting from the solid base of today’s established silicon technology.'