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Title:
 
Different Concepts of Implementing a Directly Plated Front Side Metallization into Industrial Solar Cell Mass Production
 
Author(s):
 
J. Horzel, N. Bay, T. Knarozovski, A. Träger, M. Passig, J. Burschik, M. Sieber, A. Hoffmann, B. Latzel, D. Pysch, C. Schmitt, R. Sastrawan, H. Kühnlein, K. Vosteen, H. Nussbaumer, R. Böhme, H. Schillinger, A. Letize, B. Lee, T. Söderström
 
Keywords:
 
Laser Processing, Plating, Metallization, Metallisation
 
Topic:
 
WAFER-BASED SILICON SOLAR CELLS AND MATERIALS TECHNOLOGY
Subtopic: Silicon Solar Cell Improvements
Event: 28th European Photovoltaic Solar Energy Conference and Exhibition
Session: 2BV.2.52
 
Pages:
 
1374 - 1379
ISBN: 3-936338-33-7
Paper DOI: 10.4229/28thEUPVSEC2013-2BV.2.52
 
Price:
 
 
0,00 EUR
 
Document(s): paper, poster
 

Abstract/Summary:


In this paper, RENA presents progress in developing a metallization scheme for silicon solar cells based on laser ablation and direct plating of Ni/Ag or Ni/Cu/Ag on silicon. A cluster consisting of a laser ablation tool, an inline plating sequence for NiCuAg or NiAg followed by an annealing furnace can be upgraded in conventional solar cell lines with screen printed front contacts replacing the front side print. Solar cell batches processed with the RENA NiAg metallization scheme yielded average efficiencies of 19.4% in an industrial environment on fully automated mass production tools capable of a throughput of 1200 wph. This corresponded to an efficiency increase of about 0.5% compared to the screen printed baseline. However, this metallization technology requires reliable module integration. Modules with conductive adhesives used for interconnection had been already successfully demonstrated. This work concentrates on a number of interconnection approaches for direct plated metal contacts including soldering interconnectors directly to plated busbars or alternatively to printed busbars. Furthermore, first results from smart wire interconnection are shown. Plating has been successfully applied to Al BSF solar cells, to PERC-type solar cells and to MWT solar cells and is seen as an enabling technology for future solar cell generations.