A Study on Correlation between Busbar Electrodes of Heterojunction Technology Solar Cells and the Peel Strength

Da Yeong Jun; Jiyeon Moon; Godeung Park; Zulmandakh Otgongerel; Hyeryeong Nam; Oryeon Kwon; Hyunsoo Lim; Sung Hyun Kim

doi:10.21218/CPR.2023.11.2.044

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2023 Vol.11, Issue 2 Preview Page Next Page

A Study on Correlation between Busbar Electrodes of Heterojunction Technology Solar Cells and the Peel Strength 실리콘 이종접합 태양전지의 버스바 전극 두께와 접합강도의 상관관계

30 June 2023. pp. 44-48

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Abstract

In heterojunction technology (HJT) solar cells, low-temperature curing paste is used because the passivation layer deteriorates at high temperatures of 200°C or higher. However, manufacturing HJT photovoltaic (PV) modules is challenging due to the weak peel strength between busbar electrodes and cells after soldering process. For this issue, the electrode thicknesses of the busbars of the HJT solar cell were analyzed, and the peel strengths between electrodes and wires were measured after soldering using an infrared (IR) lamp. As a result, the electrodes printed by the screen printing method had a difference in thickness due to screen mask. Also, as the thickness of the electrode increased, the peel strength of the wire increased.

Keywords

Busbar

HJT solar cells

Peel strength

References

S. Tohoda, D. Fujishima, A. Yano, A. Ogane, K. Matsuyama, Y. Nakamura, N. Tokuoka, H. Kanno, T. Kinoshita, H. Sakata, M. Taguchi, and E. Maruyama, "Future directions for higher-efficiency HIT solar cells using a Thin Silicon Wafer," Journal of Non-Crystalline Solids, vol. 358, no. 17. Elsevier BV, pp. 2219-2222 (2012). 10.1016/j.jnoncrysol.2012.03.025

M. Taguchi, A. Yano, S. Tohoda, K. Matsuyama, Y. Nakamura, T. Nishiwaki, K. Fujita, and E. Maruyama, "24.7% Record Efficiency HIT Solar Cell on Thin Silicon Wafer," IEEE Journal of Photovoltaics, vol. 4, no. 1. Institute of Electrical and Electronics Engineers (IEEE), pp. 96-99 (2014). 10.1109/JPHOTOV.2013.2282737

LONGI Solar, "At 26.81%, LONGi sets a new world record efficiency for silicon solar cells," https://www.longi.com/en/news/propelling-the-transformation/ (2022).

S. De Wolf and M. Kondo, "Nature of doped a-Si:H/c-Si interface recombination," Journal of Applied Physics, vol. 105, no. 10. AIP Publishing, p. 103707 (2009). 10.1063/1.3129578

S. Braun, G. Micard, and G. Hahn, "Solar Cell Improvement by using a Multi Busbar Design as Front Electrode," Energy Procedia, vol. 27. Elsevier BV, pp. 227-233 (2012). 10.1016/j.egypro.2012.07.056

J. Walter, L. C. Rendler, C. Ebert, A. Kraft, and U. Eitner, "Solder joint stability study of wire-based interconnection compared to ribbon interconnection," Energy Procedia, vol. 124. Elsevier BV, pp. 515-525 (2017). 10.1016/j.egypro.2017.09.288

S. Braun, G. Hahn, R. Nissler, C. Pönisch, and D. Habermann, "Multi-busbar Solar Cells and Modules: High Efficiencies and Low Silver Consumption," Energy Procedia, vol. 38. Elsevier BV, pp. 334-339 (2013). 10.1016/j.egypro.2013.07.286

A. De Rose, D. Erath, T. Geipel, A. Kraft, and U. Eitner, "Low-Temperature Soldering for the Interconnection of Silicon Heterojunction Solar Cells," 33rd European Photovoltaic Solar Energy Conference and Exhibition; 710-714 (2017).

S. Pingel, D. Erath, T. Wenzel, S. Nold, D. Eberlein, A. De Rose, S. Tepner, J. Schube, G. Ivanov, E. Terukova, A. Moldovan, A. Lorenz, and F. Clement, "Low-temperature Ag-Paste Screening for Silicon Heterojunction Solar Cells and Modules," 37th European Photovoltaic Solar Energy Conference and Exhibition; 508-511 (2020).

A. De Rose, T. Geipel, D. Eberlein, A. Kraft, and M. Nowottnick, "Interconnection of Silicon Heterojunction Solar Cells by Infrared Soldering - Solder Joint Analysis and Temperature Study," 36th European Photovoltaic Solar Energy Conference and Exhibition; 229-234 (2019).

Y. Zemen, H.-S. Teusch, G. Kropke, S. Pingel, and S. Held, "The Impact of Busbar Surface Topology and Solar Cells Soldering Process," 27th European Photovoltaic Solar Energy Conference and Exhibition; 2030-2034 (2012).

Moyer, J., Zhang, W., Kurtz, E., Tavares, R., Buzby, D., and Kleinbach, S., "The Role of Silver Contact Paste on Reliable Connectivity Systems," 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 2624-2630 (2010).

Schmitt, P., Eberlein, D., Voos, P., Tranitz, M., and Wirth, H. "Metallographic Preparation of Solar Cell Samples for Quality Assurance and Material Evaluation," Energy Procedia. Elsevier BV. 402-408 (2011). 10.1016/j.egypro.2011.06.157

Information

Publisher :Korea Photovoltaic Society
Publisher(Ko) :한국태양광발전학회
Journal Title :Current Photovoltaic Research
Volume : 11
No :2
Pages :44-48
Received Date : 2023-04-19
Revised Date : 2023-06-04
Accepted Date : 2023-06-08
DOI :https://doi.org/10.21218/CPR.2023.11.2.044

Current Photovoltaic Research ISSN:2288-3274(Print) 2508-125X(Online)

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