| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Study on Electrical Performance Failure of Mono-crystalline Silicon Photovoltaic Module After Outdoor Operation for 17 Years |
| LAI Haiwen1, HAN Huili1, HUANG Weihong1, DONG Xian2, LI Bingzhi1, SHEN Hui1,2, LIANG Zongcun1,2
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1 Institute for Solar Energy Systems, School of Physics, Sun Yat-Sen University,Guangzhou 510275
2 Shunde SYSU Institute for Solar Energy, Foshan 528300 |
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Abstract The electrical performance failure of a batch of SM55 mono-crystalline silicon PV modules was carried out in this study. These modules were manufactured by Siemens Solar Company, installed in the seaside of Shenzhen and in service for 17 years. The average maximum power (Pmax) degradation of 944 modules was 23.5%, which was mainly caused by the serious reduction of fill factor (FF) and short-circuit (Isc) of module. It could be easily found from the EL and IR images of the modules that brightness along the busbar, which caused by the solder bond failure, and the dark area in the middle of the solar cell were the main defects in EL image. That might be the main reason for the reduction of the FF of the module. Further observation and analysis were conducted on the front fingers of the solar cell by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and X-ray photoelectron spectroscopy (XPS). It was found that there was lead acetate needle-like substance formed in the front fingers of the dark area in the solar cell, resulting in the increase of contact resistance and metal resistance. The surface of PV glass has been contaminated, and there was adhesive dust on the edge of PV glass, which led to the drop of the transmittance of the PV glass. A more serious decrease in transmittance has been found at the edge of PV glass, causing a significant decrease of Isc of the module. Meanwhile, PV module samples were prepared, some modules used normal solar cell, some modules used the high series resistance solar cell with normal EL image and some modules used the high series resistance solar cell. These PV module samples were accelerated degradation under damp-heat test to simulate the impact of high square resistance on the solder bond failure. The results showed that bright spot appeared along the busbar of the high series resistance solar cell with normal EL image module, there was a corresponding higher temperature of the bright spot shown in IR image. This indicates that the high series resistance solar cell with normal EL image may promote the risk of solder bond failure and corrosion of busbar in a hot and humid environment.
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Published: 31 January 2019
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| Fund:This work was financially supported by the National High-tech R&D Program of China (863 Program) under Grant 2015AA050303. |
| About author:: Haiwen Lai received his M.S. degrees in June 2016 from Sun Yat-Sen University in engineering. From March 2015 to March 2016, he co-educated and lear-ned at the Shunde SYSU Institute for Solar Energy, focusing on the research on solar cell and energy storage battery development and reliabilityZongcun Liang,received his PhD. Degree from Sun Yat-Sen University in 2004. He is currently an professor in Sun Yat-Sen University. He mainly participates in the development of high efficiency solar cell technology and the photovoltaic materials and device, which is the member of the China Photovoltaic Society. More than 70 academic papers have been published, and 10 patents have been authorized. |
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1 Hacke P, Terwilliger K, Smith R, et al. In: The 37th IEEE Photovoltaic Specialists Conference (PVSC), Washington,2011, pp.000814.
2 Peng P, Hu A, Zheng W, et al. RSC Advances,2012,2(30),11359.
3 Czanderna A W, Pern F J. Solar Energy Materials & Solar Cells,1996,43(2),101.
4 Dong Xian, Wang Honglei, Jin Yeyi, et al, In: The 31nd edition of the European Photovoltaic Energy Conference and Exhibition. Hamburg, Germany,2015.
5 Fuyuki T, Kaji Y, Ogane A, et al. In: Photovoltaic Energy Conversion, Conference Record of the 2006 IEEE, World Conference on IEEE,2006,pp.905.
6 Han H, Dong X, Lai H, et al. IEEE Journal of Photovoltaics,2018,8(3),806.
7 Thomas J M, Tricker M J. Journal of the Chemical Society Faraday Transactions,1975,71(2),329.
8 Kraft A, Labusch L, Ensslen T, et al. IEEE Journal of Photovoltaics,2015,5(3),736.
9 Schubert G, Huster F, Fath P. Solar Energy Materials & Solar Cells,2006,90(18),3399.
10 Peike C, Hoffmann S, Hülsmann P, et al. Solar Energy Materials & Solar Cells,2013,116(9),49.
11 Pern F J. Macromolecular Materials & Engineering,1997,252(1),195.
12 Czanderna A W, Pern F J. Solar Energy Materials & Solar Cells,1996,43(2),101.
13 Pern F J. In: Photovoltaic Energy Conversion,1994. Conference Record of the Twenty Fourth. IEEE Photovoltaic Specialists Conference,1996,pp.897.
14 Jiang S, Wang K, Zhang H, et al. Macromolecular Reaction Enginee-ring,2015,9(5),522. |
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2019, Vol. 33 
