CdTe多晶薄膜太阳电池的结构改进  

IMPROVEMENT OF THE STRUCTURE OF CdTe POLYCRYSTALLINE THIN FILM SOLAR CELL

作　　者：夏庚培[1] 蔡伟[1] 郑家贵[1] 冯良桓[1] 蔡亚平[1] 黎兵[1] 李卫[1] 武莉莉[1] 鄢强[1] 

机构地区：[1]四川大学材料系,成都610064

出　　处：《太阳能学报》2005年第3期367-370,共4页Acta Energiae Solaris Sinica

基　　金：国家自然基金项目(50076030)国家863项目(2001AA513010)

摘　　要：采用共蒸发法制备了ZnTe:Cu和Cd1-xZnxTe多晶薄膜,研究了薄膜的结构和性能。获得了Cd1-xZnxTe多晶薄膜的光能隙与锌含量的关系,ZnTe:Cu多晶薄膜光能隙随着掺Cu浓度的增加,光能隙减小。分别用ZnTe/ZnTe:Cu和Cd1-xTe/ZnTe:Cu复合层作为背接触层,既能修饰异质结界面,改善电池的能带结构,又能防止Cu原子向电池内部扩散。获得了面积0.5cm2,转换效率为13.38%的CdTe多晶薄膜太阳电池。Polycrystalline ZnTe:Cu and Cd1-xZnxTe films have been prepared by vacuum co-evaporation technique. The structure and the properties of the films were studied. Optical energy gaps of Cd1-xZnxTe dependence of Zn content were obtained. Optical energy gaps of ZnTe:Cu decreasing with Concentration of Cu-doped increasing were observed. Polycrystalline ZnTe/Cd1-xZnxTe and ZnTe/ZnTe:Cu films are used as buffer layer separately, as modification of the energy band diagram, improvement of the energy band structure, also preventing Cu atom diffusing into the cells. The solar cell of 0.5 cm2 with an efficiency of 13.38% has been fabricated.

关 键 词：太阳电池 多晶薄膜CdTe 

分 类 号：O484[理学—固体物理]