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Development of economical improved thick film solar cell contact

Author
Mentley, D.
Published
Jan 1, 1979.
Physical Description
1 electronic document
Additional Creators
Ross, B.
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary
Materials were surveyed to provide candidates for an all metal electrode paste system. These consisted of a major constituent metal powder, a low melting metal powder suitable for a liquid phase sintering medium, and a powder material suitable as an etchant for silicon dioxide at sintering temperatures. By means of thermal gravimetric analysis a suitable binder was identified for low temperature fired inks. The all metal ink concept was first demonstrated with the silver system to avoid the problems of limited process windows encountered with base metal systems. A number of solid materials capable of selectively etching silicon dioxide at modest temperatures were identified. A paste with silver fluoride was screened onto N-type silicon with 5 ohm cm resistivity. The resulting contact pads had excellent adhesion but were not electrically ohmic. Metallurgically, these contacts have equal or better grain structure as commercial inks fired at the same temperatures.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19790012315.
Accession ID: 79N20486.
QR-1.
NASA-CR-158358.
DOE/JPL-955164-78/4.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15726017