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Development of improved wraparound contacts for silicon (1979)

Thornhill, J. W.

In: CASI

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Publication Date: 2019-06-27

Description: A developmental process for fabricating 2 X 4 cm back surface field silicon solar cells featuring wraparound contacts and screen printed dielectric isolation is described. The process was then used to fabricate a number of cells for evaluation and study, as well as to establish the validity of the process sequence. While a number of cells exhibiting relatively good conversion efficiencies were produced, nearly all had low I-V curve factors for the level of efficiencies attained. Cells with conversion efficiencies of more than 15 percent (air mass zero and 25 C) had fill factors of only 0.76. Evidence as to the cause of this has not been conclusive, but is most probably linked to isolation failure in the wraparound dielectric and associated shunting problems.

Keywords: ENERGY PRODUCTION AND CONVERSION

Type: NASA-CR-159748

Format: application/pdf

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