Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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A Comparison Analysis on the Efficiency of Solar Cells of Shingled Structure with Various ECA Materials

다양한 ECA 소재를 활용한 shingled 구조의 태양전지 효율 비교 분석

  • Jang, Jae Joon (Department of IT Convergence, Korea National University of Transportation) ;
  • Park, Jeong Eun (Department of Electronic Engineering, Korea National University of Transportation) ;
  • Kim, Dong Sik (Department of IT Convergence, Korea National University of Transportation) ;
  • Choi, Won Seok (Department of IT Convergence, Korea National University of Transportation) ;
  • Lim, Donggun (Department of Electronic Engineering, IT Convergence)
  • 장재준 (한국교통대학교 정보기술융합학과) ;
  • 박정은 (한국교통대학교 전자공학과) ;
  • 김동식 (한국교통대학교 정보기술융합학과) ;
  • 최원석 (한국교통대학교 정보기술융합학과) ;
  • 임동건 (한국교통대학교 전자공학과, 정보기술융합학과)
  • Received : 2019.03.27
  • Accepted : 2019.06.19
  • Published : 2019.08.30
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Abstract

Modules using 6 inch cells have problems with loss due to empty space between cells. To solve this problem made by shingled structure which can generate more power by utilizing empty space by increasing the voltage level than modules made in 6inch cell. Thus, in this paper, the c-Si cutting cells were produced using nanosecond green laser, and then the ECA was sprayed and cured to perform cutting cell bonding. Three types of ECA materials (B1, B2, B3) with Ag as the main component were used, and experimental conditions varied from 5 to 120 seconds of curing time, 130 to $210^{\circ}C$ of curing temperature, and 1 to 3 of curing numbers. As a results of experiments varying curing time, B1 showed efficiency 19.88% in condition of 60 seconds, B2 showed efficiency 20.15% in 90 seconds, and B3 showed efficiency 20.27% in 60 seconds. In addition, experiments with varying curing temperature, It was confirmed highest efficiency that 20.04% in condition of $170^{\circ}C$ with B1, 20.15% in condition of $150^{\circ}C$ with B2, 20.27% in condition of $150^{\circ}C$ with B3. These are because the Ag particles are densely formed on the surface to make the conduction path. After optimizing the conditions of temperature and curing time, the secondary-tertiary curing experiments were carried out. as the structural analysis, conditions of secondary-tertiary curing showed cracks that due to damp heat aging. As a result, it was found that the ECA B3 had the highest efficiency of 20.27% in condition of 60 seconds of curing time, $150^{\circ}C$ of curing temperature, and single number of curing, and that it was suitable for the manufacture of Solar cell of shingled structure rather than ECA B1 and B2 materials.

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References

  1. Jee, H. S., Choi, W. Y., Lee, J. H., and Jeong, C. H., Characterization of Electrically Conductive Adhesives for Shingled Array Photovoltaic Cells, Current Photovoltaic Research, Vol. 5, No. 3, pp. 95-99, 2017. https://doi.org/10.21218/CPR.2017.5.3.095
  2. Jee, H. S., Moon, D. H., Song, J. H., and Jeong, C. H., Shingled String for the High Performance Photovoltaic Module, Current Photovoltaic Research, Vol. 6, No. 4, pp. 119-123, 2018.
  3. Beaucarnen, G., Filipek, I. K., Campeol, F., Young, X., Wei, J., Yu, Y., Russell, R., and Duerinckx, F., Innovative Cell Interconnection Based on Ribbon Bonding of Busbarless Cells Using Silicone-based Electrically Conductive Adhesives, Energy Procedia, Vol. 67, pp. 185-193, 2015. https://doi.org/10.1016/j.egypro.2015.03.302
  4. Glunz, S. W., Dicker, J., Esterle, M., Hermle, M., Isenberg, J., Kamerewerd, F. J., Knobloch, J., Kray, D., Leimenstoll, A., Lutz, F., Osswald, D., Preu, R., Rein, S., Schaffer, E., Schetter, C., Schmidhuber, H., Schmidt, H., Steuder, M., Vorgrimler, C., and Willeke, G., High-efficiency Silicon Solar Cells for Low-illumination Applications, 29th IEEE Photovoltaic Specialist Conference, pp. 450-453, 2002.
  5. Wang, X. Q., Gan, W. P., Xiang, F., and Li, B. Y., Effect of Curing Agent and Curing Substrate on Low Temperature Curable Silver Conductive Adhesive, Journal of Materials Science: Materials in Electronics, Vol. 30, No. 3, pp. 2829-2836, 2019. https://doi.org/10.1007/s10854-018-0559-y
  6. Lim, J. R., Shin, W. G., Hwang, H. M., Ju, Y. C., Ko, S. W., Yoon, H. S., and Kang, G. H., Analytical Study of the Electrical Output Characteristics of c-Si Solar Cells by Cut and Shading Phenomena, Energies, Vol. 11, No. 12, p. 3397, 2018. https://doi.org/10.3390/en11123397
  7. Beaucarne, G., Filipek, I. K., Campeol, F., Young, X., Wei, J., Yu, Y., Russell, R., and Duerinckx, F., Innovative Cell Interconnection Based on Ribbon Bonding of Busbar-less Cells Using Silicone-based Electrically Conductive Adhesives, Energy Procedia, Vol. 67, pp. 185-193, 2015. https://doi.org/10.1016/j.egypro.2015.03.302