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Screenable silver and base metal solar cell contactsThe metallurgical soundness of the all-metal screenable thick film electrode system is established for silver and copper electrodes. Silver fluoride was identified as a successful etchant material and is found most effective in the liquid phase (435-460 C). Best results were achieved with the eutectic alloys of dopants and semiconductors. The air-fired silver inks were strongly adherent, rugged, and solderable, whereas the hydrogen-fired silver inks had very poor adhesion. A two-step firing process was devised in which copper inks containing silver fluoride were activated in a nitrogen atmosphere, with sintering done at the same or higher temperatures in hydrogen. Good solar cells were made using the copper paste back contacts demonstrating that the electrodes are not the limiting factors in efficiency.
Document ID
19810042791
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Ross, B.
(Bernd Ross Associates San Diego, Calif., United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1980
Subject Category
Engineering (General)
Meeting Information
Meeting: Photovoltaic Specialists Conference
Location: San Diego, CA
Start Date: January 7, 1980
End Date: January 10, 1980
Accession Number
81A27195
Distribution Limits
Public
Copyright
Other

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