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HIP-MWT: A simplified structure for metal wrap through solar cells with passivated rear surface

: Thaidigsmann, B.; Clement, F.; Wolf, A.; Lohmüller, E.; Fertig, F.; Biro, D.; Preu, R.


Glunz, S.; Aberle, A.; Brendel, R.; Cuevas, A.; Hahn, G.; Poortmans, J.; Sinton, R.; Weeber, A.:
SiliconPV 2011 Conference, 1st International Conference on Crystalline Silicon Photovoltaics. Proceedings : Freiburg, Germany, 17.-21.04.2011
Amsterdam: Elsevier, 2011 (Energy Procedia 8, 2011)
ISSN: 1876-6102
International Conference on Crystalline Silicon Photovoltaics (SiliconPV) <1, 2011, Freiburg>
Konferenzbeitrag, Zeitschriftenaufsatz
Fraunhofer ISE ()
PV Produktionstechnologie und Qualitätssicherung; Silicium-Photovoltaik; Industrielle und neuartige Solarzellenstrukturen

We suggest a simplified structure for metal wrap through passivated emitter and rear cells (MWT-PERC). This so called HIP-MWT approach (high-performance MWT) overcomes the need for a structured rear side emitter. With the simplified structure, a single additional process step allows the integration of the MWT approach into a typical process sequence for PERC-type cells. A comparison of a reference MWT-PERC structure and the simplified HIPMWT structure on cell level reveals similar efficiency levels for both approaches. The processed multicrystalline HIP-MWT silicon solar cells with a final substrate thickness of only 100 m and a cell area of 156 × 156 mm2 show conversion efficiencies of up to 17.4 % (independently confirmed).