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

Sungeun Park, Hyomin Park, Dongseop Kim, Jung Yup Yang, Dongho Lee, Young Su Kim, Hyun Jong Kim, Dongchul Suh, Byoung Koun Min, Kyung Nam Kim, Se Jin Park, Donghwan Kim, Hae Seok Lee, Junggyu Nam, Yoonmook Kang

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1 Citation (Scopus)

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%.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalMetals and Materials International
DOIs
Publication statusAccepted/In press - 2018 Mar 1

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Keywords

  • Al paste
  • Aluminum silicon eutectic paste
  • PERC solar cells
  • Rear passivation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

Park, S., Park, H., Kim, D., Yang, J. Y., Lee, D., Kim, Y. S., Kim, H. J., Suh, D., Min, B. K., Kim, K. N., Park, S. J., Kim, D., Lee, H. S., Nam, J., & Kang, Y. (Accepted/In press). Optimization of Controllable Factors in the Aluminum Silicon Eutectic Paste and Rear Silicon Nitride Mono-Passivation Layer of PERC Solar Cells. Metals and Materials International, 1-8. https://doi.org/10.1007/s12540-018-0032-8