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Performance of CdTe solar cells with different back electrodes and back contact layers

Song Hui-Jin Zheng Jia-Gui Feng Liang-Huan Cai Wei Cai Ya-Ping Zhang Jing-Quan Li Wei Li Bing Wu Li-Li Lei Zhi Yan Qiang

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Performance of CdTe solar cells with different back electrodes and back contact layers

Song Hui-Jin, Zheng Jia-Gui, Feng Liang-Huan, Cai Wei, Cai Ya-Ping, Zhang Jing-Quan, Li Wei, Li Bing, Wu Li-Li, Lei Zhi, Yan Qiang
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  • In this paper, the effects of Ni and Au back electrode on the performance of CdTe solar cells and the mechanisms have been studied by experiment. Among the back electrodes of Ni, Ni/Au, Au/Ni and Au film, only when the Ni film contacts the ZnTe/ZnTe:Cu complex layers, does the conversion efficiency increase with the short current increasing. So it is probable that the conversion efficiencies of cells will be increased by 4% at least, and the cost in large scale manufacturing will be cut down. By analyzing the dark C-V/I-V cures and the XPS using different back electrode films, it has been found the concentration and depth of Ni diffusion in the ZnTe/ZnTe:Cu back contact layer are greater than that of Au. What's more, most Nix+ combine with the abundant Te ions in ZnTe/ZnTe:Cu back contact layer to form the NixTe. So the diffusion concentration is increased, which makes the characters of CdTe improved.
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  • Abstract views:  7457
  • PDF Downloads:  1424
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Publishing process
  • Received Date:  03 July 2006
  • Accepted Date:  12 August 2006
  • Published Online:  11 July 2007

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