Journal
NATURE PHOTONICS
Volume 9, Issue 1, Pages 61-67Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHOTON.2014.255
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Funding
- Canada Foundation for Innovation
- Discovery (NSERC)
- FQRNT
- European Network WIROX
- Alexander von Humboldt Foundation
- NSERC
- FRQNT
- CSC
- FRQS
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Multiferroic films are increasingly being studied for applications in solar energy conversion because of their efficient ferroelectric polarization-driven carrier separation and above-bandgap generated photovoltages, which in principle can lead to energy conversion efficiencies beyond the maximum value (similar to 34%) reported in traditional silicon-based bipolar heterojunction solar cells. However, the efficiency reported so far is still too low (<2%) to be considered for commercialization. Here, we demonstrate a new approach to effectively tune the bandgap of double perovskite multiferroic oxides by engineering the cationic ordering for the case of Bi2FeCrO6. Using this approach, we report a power conversion efficiency of 8.1% under AM 1.5 G irradiation (100 mWcm(-2)) for Bi2FeCrO6 thin-film solar cells in a multilayer configuration.
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