The Europan project 20plμs: 20 percent efficiency on less than 100 μm thick industrially feasible crystalline Si solar cells

Barbara Terheiden, Renate Horbelt, Yvonne Schiele, Sabine Seren, Jan Ebser, G Hahn, Dominique Morrison, Keith Heasman, Stephen Devenport, Zachary Holman, Antoine Descoeudres, Stefaan De Wolf, Christophe Baliff, Pierre Saint-cast, Bernhard Michl, Christian Schmiga, Bernd Weber, Stefan W Glunz, Max B Koentopp, Maximilian ScherffTabitha Ballmann, Jörg W Müller, Danilo Antonelli, Chiara Busto, Federico Grasso, Francesca Ferrazza, Elisa Tonelli, Kasper Baert, Filip Duerinckx, Antonio Cacciato, Wolfgang Oswald

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

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 multi- crystalline 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.
Original languageEnglish (US)
Title of host publication27th European Photovoltaic Solar Energy Conference and Exhibition
Number of pages5
StatePublished - Sep 24 2012
Externally publishedYes
Event27th European Photovoltaic Solar Energy Conference and Exhibition - , Germany
Duration: Sep 24 2012Sep 28 2012

Conference

Conference27th European Photovoltaic Solar Energy Conference and Exhibition
CountryGermany
Period09/24/1209/28/12

Keywords

  • high efficiency
  • light trapping
  • thin si wafer

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