대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제36권11호
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  • Pages.1135-1140
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  • 2012
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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태양전지 2 단계 전극형성 공정을 위한 마스크 패턴공정 및 효율에 대한 영향성 연구

Mask Patterning for Two-Step Metallization Processes of a Solar Cell and Its Impact on Solar Cell Efficiency

  • 이창준 (부경대학교 인쇄정보공학과 인쇄전자실험실) ;
  • 신동윤 (부경대학교 인쇄정보공학과 인쇄전자실험실)
  • Lee, Chang-Joon (Dept. of Graphic Arts Information Engineering, Pukyong Nat'l Univ.) ;
  • Shin, Dong-Youn (Dept. of Graphic Arts Information Engineering, Pukyong Nat'l Univ.)
  • 투고 : 2012.06.08
  • 심사 : 2012.08.29
  • 발행 : 2012.11.01
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초록

마스크를 이용하여 니켈 시드층의 형성 후 실버 도금을 통해 태양전지 상부전극을 형성하는 2 단계 전극형성 공정이 태양전지의 고효율화 방안으로 제안되었다. 본 연구에서는, 자외선 경화형 혹은 상변화 잉크를 고비용의 인쇄공정을 통해 마스크를 형성하는 방법을 대신하여, 코팅과 레이저의 복합공정을 통해 마스크를 형성하는 방법에 대해 제안하도록 한다. 마스크를 형성하는 물질로서 저비용의 저융점 왁스 혹은 플루오르카본 용액을 태양전지 웨이퍼 상에 코팅 후 레이저로 선택적으로 제거하여 전극패턴을 형성하였으며, 플루오르카본 용액 코팅이 왁스 코팅보다 패턴 균일도 측면에서 우수할 뿐만 아니라 통계적으로 0.16% 태양전지 효율증대를 유발한다는 점이 발견되었다.

Two-step metallization processes have been proposed to achieve high-efficiency silicon solar cells, where the front-side grids are formed by silver plating after the formation of a nickel seed layer with a mask. Because the conventional mask patterning process is performed by an expensive selective printing method using either UV resist or phase change ink, however, the combination of a simple coating and laser-selective ablation processes is proposed in this study as an alternative means. As a masking material, the solar cell wafer was coated with either inexpensive wax having a low melting temperature or a fluorocarbon solution, and then, an electrode image was patterned by selectively removing the masking material using the laser. It was found that the fluorocarbon coating was not only superior to the wax coating in terms of pattern uniformity but it also increased the efficiency of the solar cell by 0.16%, as confirmed by statistical f and t tests.

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참고문헌

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피인용 문헌

  1. Comparison of Contact Resistivity Measurements of Silver Paste for a Silicon Solar Cell Using TLM and CTLM vol.38, pp.6, 2014, https://doi.org/10.3795/KSME-B.2014.38.6.539