Preparation and UV Photodetection Properties of a Co3O4/Fe2O3 Heterojunction Composite
In this study,we prepare a Co3O4 seed layer and thin film on an FTO substrate using spin-coating and hydrothermal methods,respectively.We then hydrothermally grow Fe2O3 nanorods on the Co3 O4 thin film to obtain high-quality Co3O4/Fe2O3 heterojunction composite materials.By changing the concentration of the Fe2O3 precursor solution,we can alter the contents of the Fe2O3 components in the heterojunction composite materials.Results indicated that Fe2O3 nanorods covered the Co3O4 thin film with a network structure.With an increase in the Fe2O3 precursor solution concentration,the response of the Co3O4/Fe2O3 heterojunction composite material to ultraviolet light gradually increased.When the concentration of the Fe2O3 precursor solution was 0.015 mol/L,the heterojunction composite material exhibited good photoelectric stability,a high response rate(12.5 mA/W),and a high detection rate(4.4×1010 Jones).
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