Optoelectrical Regulation of CuBiO Photocathode via Photonic Crystal Structure for Solar-Fuel Conversion.

Metal oxide semiconductors have been regarded as ideal candidates for photoelectrochemical (PEC) CO reduction if the contradiction between photon harvesting and photocarrier collection can be resolved. The novel three-dimensional structure provides an available approach to balancing the above-mentioned contradiction. In this work, CuBiO photonic crystal photocathodes with different feature sizes were developed to realize the regulation of optoelectrical properties.