Heterojunction solar cell with 2% efficiency based on a Cu 2 O substrate

We report on the fabrication of heterojunction solar cells made by deposition of transparent conducting oxide (TCO) films on Cu 2 O substrates. The TCO films have been grown by ion beam sputtering on good quality Cu 2 O sheets prepared by oxidizing copper at a high temperature. The best solar cell h...

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Bibliographic Details
Published in:Applied physics letters 2006-04, Vol.88 (16), p.163502-163502-2
Main Authors: Mittiga, Alberto, Salza, Enrico, Sarto, Francesca, Tucci, Mario, Vasanthi, Rajaraman
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Summary:We report on the fabrication of heterojunction solar cells made by deposition of transparent conducting oxide (TCO) films on Cu 2 O substrates. The TCO films have been grown by ion beam sputtering on good quality Cu 2 O sheets prepared by oxidizing copper at a high temperature. The best solar cell has reached an open-circuit voltage of 0.595 V , a short-circuit current density of 6.78 mA ∕ cm 2 , a fill factor of 50%, and a conversion efficiency of 2% under simulated AM1.5G illumination, which is the highest efficiency value reported for this kind of heterojunction devices. These devices represent a good starting point for the development of very low cost solar cells.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2194315