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Optimization of Controllable Factors in the Aluminum Silicon Eutectic Paste and Rear Silicon Nitride Mono-Passivation Layer of PERC Solar Cells

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Abstract

Passivated emitter and rear contact (PERC) is a promising technology owing to high efficiency can be achieved with p-type wafer and their easily applicable to existing lines. In case of using p-type mono wafer, 0.5–1% efficiency increase is expected with PERC technologies compared to existing Al BSF solar cells, while for multi-wafer solar cells it is 0.5–0.8%. We addressed the optimization of PERC solar cells using the Al paste. The paste was prepared from the aluminum–silicon alloy with eutectic composition to avoid the formation of voids that degrade the open-circuit voltage. The glass frit of the paste was changed to improve adhesion. Scanning electron microscopy revealed voids and local back surface field between the aluminum electrode and silicon base. We confirmed the conditions on the SiNx passivation layer for achieving higher efficiency and better adhesion for long-term stability. The cell characteristics were compared across cells containing different pastes. PERC solar cells with the Al/Si eutectic paste exhibited the efficiency of 19.6%.

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  • 28 June 2018

    The original version of this article unfortunately contained a mistake. The acknowledgements section was incomplete. The correct information is given below.

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Acknowledgements

This work was supported by a National Research Foundation of Korea grant funded by the Korean Government (MSIP) (2016, University-Institute 165 cooperation program).

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea

    Sungeun Park, Hyomin Park, Se Jin Park & Donghwan Kim

  2. Solar Energy Development Group, Samsung SDI, Yongin, 17084, Republic of Korea

    Dongseop Kim, Dongho Lee, Young-Su Kim, Hyun-Jong Kim & Junggyu Nam

  3. Department of Physics, Kunsan National University, Kunsan, 54150, Republic of Korea

    JungYup Yang

  4. Department of Chemical Engineering, Hoseo University, Asan, 31499, Republic of Korea

    Dongchul Suh

  5. Clean Energy Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea

    Byoung Koun Min

  6. KU-KIST Green School, Graduate School of Energy and Environment, Korea University, Seoul, 02841, Republic of Korea

    Kyung Nam Kim, Hae-Seok Lee & Yoonmook Kang

Authors
  1. Sungeun Park
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  2. Hyomin Park
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  3. Dongseop Kim
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  9. Byoung Koun Min
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  10. Kyung Nam Kim
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  11. Se Jin Park
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  13. Hae-Seok Lee
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  15. Yoonmook Kang
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Corresponding authors

Correspondence to Hae-Seok Lee, Junggyu Nam or Yoonmook Kang.

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Park, S., Park, H., Kim, D. et al. Optimization of Controllable Factors in the Aluminum Silicon Eutectic Paste and Rear Silicon Nitride Mono-Passivation Layer of PERC Solar Cells. Met. Mater. Int. 24, 664–671 (2018). https://doi.org/10.1007/s12540-018-0032-8

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  • DOI: https://doi.org/10.1007/s12540-018-0032-8

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