박형 태양전지모듈 제작을 위한 저온 CP 공정 최적화에 관한 연구
A Study on the Optimization of CP Based Low-temperature Tabbing Process for Fabrication of Thin c-Si Solar Cell Module
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초록
Thin crystalline silicon (C-Si) solar cell is expected to be a low price energy source by decreasing the consumption of Si. However, thin c-Si solar cell entails the bowing and crack issues in high temperature manufacturing process. Thus, the conventional tabbing process, based on high temperature soldering (> 250°C), has difficulties for applying to thin c-Si solar cell modules. In this paper, a conductive paste (CP) based interconnection process has been proposed to fabricate thin c-Si solar cell modules with high production yield, instead of existing soldering materials. To optimize the process condition for CP based interconnection, we compared the performance and stability of modules fabricated under various lamination temperature (120, 150, and 175°C). The power from CP based module is similar to that with conventional tabbing process, as modules are fabricated. However, the output of CP based module laminated at 120°C decreases significantly (14.1% for Damp heat and 6.1% for thermal cycle) in harsh condition, while the output drops only in 3% in the samples process at 150°C, 175°C. The peel test indicates that the unstable performance of sample laminated at 120°C is attributed to weak adhesion strength (1.7 N) between cell and ribbon compared to other cases (2.7 N). As a result, optimized lamination temperature for CP based module process is 150°C, considering stability and energy consumption during the fabrication
Abstract
Thin crystalline silicon (C-Si) solar cell is expected to be a low price energy source by decreasing the consumption of Si. However, thin c-Si solar cell entails the bowing and crack issues in high temperature manufacturing process. Thus, the conventional tabbing process, based on high temperature soldering (> 250°C), has difficulties for applying to thin c-Si solar cell modules. In this paper, a conductive paste (CP) based interconnection process has been proposed to fabricate thin c-Si solar cell modules with high production yield, instead of existing soldering materials. To optimize the process condition for CP based interconnection, we compared the performance and stability of modules fabricated under various lamination temperature (120, 150, and 175°C). The power from CP based module is similar to that with conventional tabbing process, as modules are fabricated. However, the output of CP based module laminated at 120°C decreases significantly (14.1% for Damp heat and 6.1% for thermal cycle) in harsh condition, while the output drops only in 3% in the samples process at 150°C, 175°C. The peel test indicates that the unstable performance of sample laminated at 120°C is attributed to weak adhesion strength (1.7 N) between cell and ribbon compared to other cases (2.7 N). As a result, optimized lamination temperature for CP based module process is 150°C, considering stability and energy consumption during the fabrication
참고문헌 (9)
- Kang, M. G., "Thin c-Si Solar Cell Technology Trends", Bulletin of the Korea Photovoltaic Society, 2(1), pp.6~17 (2016)
- 백태현, "박형 결정질 실리콘 태양전지에서의 휨현상 감소를 위한 알루미늄층 두께 조절", 한국태양에너지학회 논문집, 32(3), pp.194~198 (2012), 한국태양에너지학회
- Zemen, Y., "The Impact of Yield Strength of the Interconnector on the Internal Stress of the Solar Cell Within a Module", 25th European Photovoltaic Solar Energy Conference and Exhibition, pp.4073~4078 (2010)
- Lalaguna, B., "Evaluation of Stress on Cells During Different Interconnection Processes", 23rd European Photovoltaic Solar Energy Conference, pp.2705~2708 (2008)
- Gabor, A. M., "Soldering Induced Damage to Thin Si Solar Cells and Detection of Cracked Cells in Modules", 21st European Photovoltaic Solar Energy Conference, pp.2042~2047 (2006)
- Shimizu, S., "U.S. Patent Application 13", 217,666
- Sakamoto, T., "U.S. Patent Application 12", 725,289
- Kang, K. C., "The Optimimum Gel Content Characteristics for Cell Cracks Prevention in PV Module", The Korean Institute of Electrical Engineers, pp.1108~1109 (2007)
- Kim, B. M., "A Study on Manufacturing Process of PV Module According to EVA Sheet Type", The Korean Solar Energy Society, 30(2), pp.183~188 (2010)