Fabrication and optical properties of Cu2O–ZnO composite opal
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Cu2O–ZnO composite opal was fabricated by electrodeposition using ZnO inverse opal as template. The photonic stop band of the composite opal can be observed from the UV–Vis spectrum, which indicates that the Cu2O filled into ZnO inverse opal did not destroy its three-dimensional (3D) ordered structure. Due to the multiple scattering in the 3D ordered structure, the absorption and photoluminescence (PL) are stronger in Cu2O–ZnO composite opal than those in a Cu2O/ZnO bilayer film and a Cu2O/ITO film without 3D ordered structure. The remaining ZnO inverse opal in Cu2O–ZnO composite opal enhances the photoluminescence measured in back geometry while it suppresses that in front geometry.
PACS42.70.Qs 62.23.Pq 82.45.Yz
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