Cu_2O-ZnO异质结太阳能电池的制备及光电性能研究(英文)

Fabrication and Photovoltaic Properties of Cu_2O/ZnO p-n Heterojunction Solar Cells

电化学沉积是一种绿色高效的材料制备方法。本实验使用电化学沉积法分别制备了单晶的氧化锌(ZnO)纳米棒阵列和p型的氧化亚铜(Cu2O)薄膜,并对样品进行了扫描电镜、X光衍射、外量子效率和光电性能测试等一系列的表征和测试。试验结果表明,通过改变反应溶液中的ZnCl2浓度可以来调控ZnO纳米棒的直径。光电性能测量显示在Cu2O/ZnO间形成了p-n异质结。量子效率的测试证明该异质结可有效地促进载流子的分离和传送,从而提高太阳能电池的转化效率。

Single-crystal n-type zinc oxide（ZnO） nanorod arrays,p-type cuprous oxide（Cu2 O） film,and Cu2 O/ZnO heterostructures were fabricated by electrochemical deposition.The diameter of ZnO nanorods can be controlled by changing the ZnCl2 concentration as it increases with the concentration of ZnCl2.Electrical measurements demonstrate a p-n junction forms between Cu2 O film and ZnO nanorod arrays.External quantum efficiency of the p-n junction is higher than that of ZnO nanorod arrays and Cu2 O film,which indicates that the formation of a p-n junction between Cu2 O film and ZnO nanorod arrays can efficiently facilitate the separation and transport of charge carriers for applications in solar cells.