NDLI: In-situ observations of glass frit related effects during the front side paste contact formation

Content Provider	IEEE Xplore Digital Library
Author	Eberstein, M. Schmidt, U. Korner, S. Reinhardt, K. Jurk, R. Partsch, U.
Copyright Year	2014
Description	Author affiliation: Fraunhofer Inst. for Ceramic Technol. & Syst., Dresden, Germany (Eberstein, M.; Schmidt, U.; Korner, S.; Reinhardt, K.; Jurk, R.; Partsch, U.)
Abstract	A large number of solar cells is metallized by printing and firing glass containing silver pastes. However, the contact formation is not fully understood so far. There is still a lack of understanding the role of the glass phase in the complex contact formation scenario because single effects could not been separately observed and evaluated up to now. To overcome this, an in-situ method to observe the contact formation via a contact resistance measurement was introduced. A special measuring device was applied to characterize two typical front side pastes, featuring a PbO-containing as well as a PbO-free glass frit during firing. The viscosity of the paste glass showed decisive influence for the etching of the anti-reflection coating (ARC). The ARC was opened immediately after entering the softening range of the respective glass, regardless of large differences in glass chemistry. Furthermore, the viscosity-temperature behaviour of the paste glass determines the intensity of the redox-reaction and related silver precipitation at the interface, which takes part between ARC opening and glass resolidification. The cooling slope was confirmed to have decisive influence on the final interface conductivity, because a crucial part of silver colloids can be formed here.
Starting Page	3463
Ending Page	3469
File Size	1140150
Page Count	7
File Format	PDF
e-ISBN	9781479943982
DOI	10.1109/PVSC.2014.6925678
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Silver Glass Powders Photovoltaic cells Atmospheric measurements Particle measurements Q measurement contact formation front side pastes glass frit photovoltaic cells
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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