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Successive Redox-mediated Visible-light Ferrophotovoltaics by Noguchi, Yuji; Taniguchi, Yuki; Inoue, Ryotaro; Miyayama, Masaru is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Successive Redox-mediated Visible-light Ferrophotovoltaics about?

Titanium oxide materials have multiple functions such as photocatalytic and photovoltaic effects. Ferroelectrics provide access to light energy conversion that delivers above-bandgap voltages arising from spatial inversion symmetry breaking, whereas their wide bandgap leads to poor absorption of visible light. Bandgap narrowing offers a potential solution, but this material modification suppresses spontaneous polarization and, hence, sacrifices photovoltages. Here, we report successive-redox mediated ferrophotovoltaics that exhibit a robust visible-light response. Our single-crystal experiments and ab initio calculations, along with photo-luminescence analysis, demonstrate that divalent Fe^2+^ and trivalent Fe^3+^ coexisted in a prototypical ferroelectric barium titanate BaTiO~3~ introduce donor and acceptor levels, respectively, and that two sequential Fe^3+^/Fe^2+^ redox reactions enhance the photogenerated power not only under visible light but also at photon energies greater than the bandgap. Our approach opens a promising route to the visible-light activation of photovoltaics and, potentially, of photocatalysts.

Who reads Successive Redox-mediated Visible-light Ferrophotovoltaics?

Author

Noguchi, Yuji; Taniguchi, Yuki; Inoue, Ryotaro; Miyayama, Masaru

Publisher

Nature Publishing Group; Springer Science and Business Media LLC; [London]: Nature Publishing Group, 2010-; Society for Mining, Metallurgy and Exploration Inc.; Research Square (ISSN 2041-1723)

Published

2020

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)