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Large-scale black multi-crystalline silicon solar cell with conversion efficiency over 18 %

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Abstract

In this paper, large area multi-crystalline silicon (mc-Si) solar cells of 156 mm × 156 mm were fabricated by the combination of Ag-assisted etching and sodium hydroxide (NaOH) treatment. Scanning electron microscope, UV–Vis–NIR spectrophotometer, external quantum efficiency measurement system, and current–voltage test were used to characterize the etched black silicon wafers and the fabricated solar cells. It was found that, though the black mc-Si without NaOH treatment showed a lowest reflectance of 2.03 % in the wavelength of 400–900 nm, the maximum conversion efficiency came from the mc-Si solar cells produced by combination of Ag-assisted etching and NaOH treatment. Though the solar cell with additional NaOH treatment for 30 s presented a reflectance of 5.45 %, it presented the highest conversion efficiency of 18.03 %, which is 0.64 % higher than the traditional mc-Si solar cell (17.39 %) and much higher than that of the black mc-Si solar cell without NaOH treatment (16.24 %).

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Acknowledgments

This work is supported by the National Nature Science Foundation of China (61176062) and Joint Frontier Research Project of Jiangsu Province (BY2013003-08), a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions. Authors are also grateful to Dr. Guojun Xin in Solar Space Co. Ltd. for their assistance in fabrication of the solar cells.

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Authors and Affiliations

  1. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing, 210016, People’s Republic of China

    Zhihao Yue, Honglie Shen, Ye Jiang, Weilong Chen, Quntao Tang & Jiale Jin

  2. Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education, Institute of Nanoscience, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing, 210016, People’s Republic of China

    Honglie Shen

  3. Phono Solar Technology Co. Ltd, 2 Xinke Road, Nanjing, 210032, People’s Republic of China

    Tian Pu, Jingwang Luo, Fanjian Kong, Chunbao Rui & Jibo Cai

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  1. Zhihao Yue
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  2. Honglie Shen
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  3. Ye Jiang
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  5. Quntao Tang
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  7. Tian Pu
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  8. Jingwang Luo
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  10. Chunbao Rui
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  11. Jibo Cai
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Corresponding author

Correspondence to Honglie Shen.

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Yue, Z., Shen, H., Jiang, Y. et al. Large-scale black multi-crystalline silicon solar cell with conversion efficiency over 18 %. Appl. Phys. A 116, 683–688 (2014). https://doi.org/10.1007/s00339-014-8414-3

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  • DOI: https://doi.org/10.1007/s00339-014-8414-3

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