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The European Project 20PLµS: 20 percent efficiency on less than 100 µm thick industrially feasible crystalline-Si solar cells

: Terheiden, B.; Horbelt, R.; Schiele, Y.; Seren, S.; Ebser, J.; Hahn, G.; Morrison, D.; Heasman, K.; Devenport, S.; Holman, Z.; Descoeudres, A.; Wolf, S. de; Baliff, C.; Saint-Cast, P.; Michl, B.; Schmiga, C.; Weber, B.; Glunz, S.W.; Koentopp, M.B.; Scherff, M.; Ballmann, T.; Müller, J.W.; Antonelli, D.; Busto, C.; Grasso, F.; Ferrazza, F.; Tonelli, E.; Baert, K.; Duerinckx, F.; Cacciato, A.; Oswald, W.

Fulltext urn:nbn:de:0011-n-2366234 (921 KByte PDF)
MD5 Fingerprint: 90c8742e7e907ebc36ea12215fb0b0f9
Created on: 13.4.2013

Nowak, S. ; European Commission:
27th European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC 2012. DVD-ROM : Proceedings of the international conference held in Frankfurt, Germany, 24 - 28 September 2012
München: WIP-Renewable Energies, 2012
ISBN: 3-936338-28-0
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <27, 2012, Frankfurt>
Conference Paper, Electronic Publication
Fraunhofer ISE ()
Solarzellen - Entwicklung und Charakterisierung; Silicium-Photovoltaik; Herstellung und Analyse von hocheffizienten Solarzellen; Industrielle und neuartige Solarzellenstrukturen

The European project 20plµs is developing Si wafer solar cells with efficiencies above 20% on wafers less than 100 µm thick. Three principal solar cell process routes are investigated. The three approaches are distinguished by the doping type and maximum process temperature: p-type monocrystalline Cz-Si and multicrystalline Si solar cells subjected to high temperature processes are called pht, and n-type Cz-Si cells fabricated with low and high temperature processes are called nlt and nht, respectively. Already at the project's midterm, a particular pht solar cell process was transferred to pilot line production. Key issues such as wafering, surface passivation, light trapping, metallisation and life cycle analysis were tackled to determine which process should be transferred. To date, by integrating the processes investigated within the project into full solar cells, efficiencies up to 18.7% (pht), 19.0% (nht) and 20.8% (nlt, 4 cm2) have been achieved on 100 µm thick large area Si wafers.