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Titel:
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Optimizing the front side metallization process using the corescan
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Auteur(s):
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Gepubliceerd door:
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Publicatie datum:
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ECN
Zonne-energie
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1-5-2002
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ECN publicatienummer:
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Publicatie type:
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ECN-RX--02-021
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Conferentiebijdrage
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Aantal pagina's:
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Volledige tekst:
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4
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Download PDF
(911kB)
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Gepresenteerd op: 29th IEEE Photovoltaic Specialists Conference, New Orleans, USA, 20-24 mei 2002.
Samenvatting:
In solar cel1 manufacturing it is difficult to optimize screen printedfront side metallization, in particular to obtain good contact over
the entire cell. The Corescan enables mapping of contact resistance
of full cell surfaces. Using these mappings, it is possible to diagnose
and exclude reasons for poor contact formation. In this study, several
process conditions have been studied. Cross-belt temperature non-uniformity
in the firing furnace turns out to be a reason for large contact resistance
differences. This shows that the acceptable firing temperature range
can be considerably increased if a constant temperature profile across
the belt width is realized. Further, it is shown that plasma etching
for isolation gives cause for an increase of the contact resistance
of the fingers at the cell edges. Finally, contact resistance differences
related to emitter non-uniformity are found. To summarize, the Corescan
is a powerful tool that enables easy optimization of front side metallization.
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