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- Title
Manufacturing 100-µm-thick silicon solar cells with efficiencies greater than 20% in a pilot production line.
- Authors
Terheiden, Barbara; Ballmann, Tabitha; Horbelt, Renate; Schiele, Yvonne; Seren, Sabine; Ebser, Jan; Hahn, G.; Mertens, Verena; Koentopp, Max B.; Scherff, Maximilian; Müller, Jörg W.; Holman, Zachary C.; Descoeudres, Antoine; Wolf, Stefaan De; de Nicolas, Silvia Martin; Geissbuehler, Jonas; Ballif, Christophe; Weber, Bernd; Saint‐Cast, Pierre; Rauer, Michael
- Abstract
Reducing wafer thickness while increasing power conversion efficiency is the most effective way to reduce cost per Watt of a silicon photovoltaic module. Within the European project 20 percent efficiency on less than 100-µm-thick, industrially feasible crystalline silicon solar cells ('20plµs'), we study the whole process chain for thin wafers, from wafering to module integration and life-cycle analysis. We investigate three different solar cell fabrication routes, categorized according to the temperature of the junction formation process and the wafer doping type: p-type silicon high temperature, n-type silicon high temperature and n-type silicon low temperature. For each route, an efficiency of 19.5% or greater is achieved on wafers less than 100 µm thick, with a maximum efficiency of 21.1% on an 80-µm-thick wafer. The n-type high temperature route is then transferred to a pilot production line, and a median solar cell efficiency of 20.0% is demonstrated on 100-µm-thick wafers.
- Subjects
DIRECT energy conversion; SOLAR cells; COMPOUND parabolic concentrators; REGRESSION quantiles; ISOTHERMAL processes
- Publication
Physica Status Solidi. A: Applications & Materials Science, 2015, Vol 212, Issue 1, p13
- ISSN
1862-6300
- Publication type
Article
- DOI
10.1002/pssa.201431241