Co3O4/Fe2O3异质结复合材料的制备及其紫外光光电探测性能

Preparation and UV Photodetection Properties of a Co3O4/Fe2O3 Heterojunction Composite

摘要:

分别采用旋涂法和水热法在FTO衬底上制备Co₃O₄种子层和Co₃O₄薄膜,再在Co₃O₄薄膜上水热生长Fe₂O₃纳米棒,获得了高质量的Co₃O₄/Fe₂O₃异质结复合材料。通过改变Fe₂O₃前驱体溶液浓度来改变异质结复合材料中Fe₂O₃组分的含量。结果表明,Fe₂O₃纳米棒覆盖在呈网状结构的Co₃O₄薄膜上,随着Fe₂O₃前驱体溶液浓度即Fe₂O₃组分含量的增加,Co₃O₄/Fe₂O₃异质结复合材料对紫外光的响应逐渐增强,当Fe₂O₃前驱体溶液浓度为0.015mol/L时,异质结复合材料有着很好的光电稳定性,并表现出较高的响应率(12.5mA/W)和探测率(4.4×10¹⁰Jones)。

Abstract:

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 Co₃O₄ 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 0.015mol/L, the heterojunction composite material exhibited good photoelectric stability, a high response rate (12.5mA/W), and a high detection rate (4.4×10¹⁰Jones).