Hot-melt screen-printing of front contacts on crystalline silicon solar cells
- Contact
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Holt, Arve
Research Director
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Olaisen, Birger Retterstøl
Scientist
This work describes a study of hot-melt (HM) screenprinting of front
contacts as a function of print speed, print table temperature,
squeegee temperature, paste composition and firing profiles. The
results presented here will show that it is possible to print lines
with higher aspect ratio compared with standard screen-printing.
Optimum parameters for printing seems to be high print speed in
combination high squeegee temperature. There is a trade off between the
height and width of the finger lines when adjusting the table
temperature. Firing with fingers facing down at high belt speeds
results in shrinking of line width between 15% and 20%. At present, the
best efficiency results from HM screen-printing are at par with
standard printed solar cells.
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