Pub Date : 2013-05-25DOI: 10.1364/AOEE.2013.ASU3A.7
Bofei Liu, L. Bai, J. Ni, H. Zhao, C. Wei, Jian Sun, Ying Zhao, Xiaodang Zhang
With proper band gap profile along the film growth direction, single junction solar cell with initial efficiency of 9.07% and a-Si:H/a-SiGe:H tandem cells of 12.03% efficiency.
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