Boron doped amorphous diamond window layer deposited by filtered arc for amorphous silicon alloy p-i-n solar cells |
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Authors: | Jiaqi Zhu Huijie Zhao Jiecai Han Shanyi Du |
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Affiliation: | a Center for Composite Materials, Harbin Institute of Technology, PO Box 3010, Yikuang Street 2, Harbin 150080, PR China b School of Materials Science and Engineering, Harbin Institute of Technology, Xidazhi Street 92, Harbin 150001, PR China |
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Abstract: | In order to improve the conversion efficiency of amorphous silicon (a-Si:H) alloy p-i-n solar cells, the original p-a-Si:H window layer is substituted by the boron-doped amorphous diamond (a-D:B) films deposited using filtered cathodic vacuum arc technology. The microstructural, optical and electrical properties as functions of the boron concentrations in the films were, respectively, evaluated by an X-ray photoemission spectroscopy, an ultraviolet-visible spectrometer and a semiconductor parameter analyzer. The photovoltaic parameters of the solar cell modules were also detected as functions of boron concentration. It has been shown that the conductive a-D:B films could be obtained and still remained a wide optical gap. The p-i-n structural amorphous silicon solar cell using the a-D:B window layer increased the conversion efficiency by a roughly 10% relative improvement compared to the conventional amorphous silicon solar cell because of the enhancement of short wavelength response. |
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Keywords: | Boron doped amorphous diamond (a-D:B) Filtered cathodic vacuum arc (FCVA) Window layer p-i-n amorphous silicon solar cells |
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