在多孔阳极氧化铝(AAO)模板中分别沉积金属镍(Ni)、钴(Co),制备了 Ni/AAO和 Co/AAO纳米有序阵列复合结构,对其光吸收特性进行了比较研究。实验结果表明,相同结构参量的模板中,Ni、Co纳米粒子的表观形状随沉积时间的变化规律基本一致,但 Co/AAO及 Ni/AAO复合结构的光吸收特性却有较大差异。Ni/AAO复合结构表现出间接带隙半导体的光学特征,而Co/AAO复合结构具有直接带隙半导体的光学特征。同时,随金属沉积量的增加,Ni/AAO吸收边的红移量仅约为13 nm,而Co/AAO复合结构的吸收边红移量却超过了80 nm。用Maxwell Garnett(M- G)理论分析了导致二者光吸收特性存在较大差异的主要原因。 Metallic nickel (Ni) and cobalt (Co) were deposited in porous anodic aluminum oxide (AAO) template, and the Ni / AAO and Co / AAO nanocomposite arrays were prepared and their light absorption properties were compared. The experimental results show that the apparent shape of the Ni and Co nanoparticles in the template with the same structural parameters are basically the same with the deposition time, but the light absorption characteristics of the Co / AAO and Ni / AAO composite structures are quite different. The Ni / AAO composite structure shows the optical characteristics of the indirect bandgap semiconductor, while the Co / AAO composite structure has the optical characteristics of the direct bandgap semiconductor. At the same time, with the increase of metal deposition, the red shift of the absorption edge of Ni / AAO is only about 13 nm, while that of the Co / AAO composite structure exceeds 80 nm. Using Maxwell Garnett (M-G) theory to analyze the main reason that led to the big difference in the light absorption characteristics between the two.