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P‐type semiconductors based on ternary oxides have attracted wide interest owing to their earth‐crust abundance and favorable optoelectronic properties. Among the p‐type ternary oxides, delafossite‐phase CuFeO2 has received considerable attention because it has the potential to fully harness visible light (<800 nm) owing to its narrow bandgap (1.4–1.6 eV). Despite the favorable optoelectronic properties...
In article number 1900194, Jooho Moon and co‐workers report a novel method for boosting visible‐light harvesting in the CuFeO2 photocathode. The introduction of an inverse opal structure allows for exceptional near‐bandgap photon harvesting owing to the multiple scattering together with the short diffusion distance. The CuFeO2‐based photocathode exhibits a record‐breaking photocurrent density for...
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