Performance of Solar Cell Grids based on Ag, Au, and Al for Cost-Effective Manufacturing

Raappana, Marianna; Aho, Arto; Aho, Timo; Isoaho, Riku; Anttola, Elina; Kajas, Ninja; Polojärvi, Ville; Tukiainen, Antti; Guina, Mircea (2019-10)
 
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Raappana, Marianna
Aho, Arto
Aho, Timo
Isoaho, Riku
Anttola, Elina
Kajas, Ninja
Polojärvi, Ville
Tukiainen, Antti
Guina, Mircea
10 / 2019

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doi:10.1109/ESPC.2019.8932002
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https://urn.fi/URN:NBN:fi:tuni-202102232211

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We report on the performance of contact grids based on Ag, Al, and Au applied to III-V multijunction solar cells. We compare their their suitability as grid metals from different perspectives, including price, mass-to-conductivity ratio, and abundance. The grid functionality was evaluated by performing charge transport experiments under simulated sunlight. The best solar cell performance was obtained for Ag contacts. On the other hand, Al and Ag provide the most cost-effective approach: when compared to Au for equal conductivities, the cost for the grid material being only about 1.1% in the case of Ag, and 0.7% for Al.
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