Study on the Back Contact Performances of CdTe Solar Cells by XPS
SONG Hui-jin1, ZHENG Jia-gui1, FENG Liang-huan1, ZHANG Jing-quan1, LI Wei1, LI Bing1, WU li-li1, LEI Zhi1, YAN Qiang2
1. College of the Materials Science & Engineering, Sichuan University, Chengdu 610064, China 2. Southwestern Institute of Physics, Chengdu 610041, China
Abstract：The metal materials with high work function should be used as the back electrode of CdTe solar cells. In the present paper, the back contact performances of CdTe solar cells with Au film and Ni film, respectively, were studied by X-ray photoelectron spectrum (XPS). After exfoliating the back electrode film, it was found that Au on the surface of ZnTe/ZnTe∶Cu complex back contact layer is in the form of Au atoms and the concentration and depth of Ni diffusing into the ZnTe/ZnTe∶Cu back contact layer are higher than that of Au. What’s more, some Ni changes into Ni+x ion which leads to rich Te ions in ZnTe/ZnTe∶Cu back contact layer. So the diffusing concentration is increased, which makes the characters of CdTe improved. In the samples, the displacement of either Te or Zn peak position changes little, which indicates that both Te and Zn do not change in the modality.
Key words：XPS;Back contact performance;Back electrode;CdTe solar cell
宋慧瑾1,郑家贵1,冯良桓1,张静全1,李卫1,黎兵1,武莉莉1,雷智1,鄢强1, 2. 用光电子能谱研究CdTe太阳电池的背接触特性[J]. 光谱学与光谱分析, 2008, 28(12): 2737-2740.
SONG Hui-jin1, ZHENG Jia-gui1, FENG Liang-huan1, ZHANG Jing-quan1, LI Wei1, LI Bing1, WU li-li1, LEI Zhi1, YAN Qiang2. Study on the Back Contact Performances of CdTe Solar Cells by XPS. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(12): 2737-2740.
