Laser scribing of multilayer-thin-film solar cells is an important process for producing integrated serial interconnection of mini-modules, used to reduce photocurrent and resistance losses in a large-area solar cell. Quality of such scribing contributes to the overall quality and efficiency of the solar cell, and therefore predictive capabilities of the process are essential. Limited numerical work has been performed in predicting the thin film laser removal processes. In this study, a fully-coupled multilayer thermal and mechanical finite element model is developed to analyze the laser-induced spatio-temporal temperature and thermal stress responsible for SnO2:F film removal. A plasma expansion induced pressure model is also investigated to simulate the nonthermal film removal of CdTe due to the micro-explosion process. Corresponding experiments of SnO2:F films on glass substrates by 1064 nm ns laser irradiation show a similar removal process to that predicted in the simulation. Differences between the model and experimental results are discussed and future model refinements are proposed. Both simulation and experimental results from glass-side laser scribing show clean film removal with minimum thermal effects indicating minimal changes to material electrical properties.
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October 2013
Research-Article
Predictive Modeling for Glass-Side Laser Scribing of Thin Film Photovoltaic Cells
Hongliang Wang,
Hongliang Wang
1
e-mail: hw2288@columbia.edu
1Corresponding author.
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Y. Lawrence Yao,
Y. Lawrence Yao
Department of Mechanical Engineering,
Columbia University
,New York, NY 10027
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Magdi N. Azer
Magdi N. Azer
Laser & Metrology System Lab,
GE Global Research,
GE Global Research,
Niskayuna, NY 12309
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Hongliang Wang
e-mail: hw2288@columbia.edu
Y. Lawrence Yao
Department of Mechanical Engineering,
Columbia University
,New York, NY 10027
Magdi N. Azer
Laser & Metrology System Lab,
GE Global Research,
GE Global Research,
Niskayuna, NY 12309
1Corresponding author.
Contributed by the Manufacturing Engineering Division of ASME for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received November 27, 2012; final manuscript received May 21, 2013; published online September 11, 2013. Assoc. Editor: Y. B. Guo.
J. Manuf. Sci. Eng. Oct 2013, 135(5): 051004 (11 pages)
Published Online: September 11, 2013
Article history
Received:
November 27, 2012
Revision Received:
May 21, 2013
Citation
Wang, H., Hsu, S., Tan, H., Yao, Y. L., Chen, H., and Azer, M. N. (September 11, 2013). "Predictive Modeling for Glass-Side Laser Scribing of Thin Film Photovoltaic Cells." ASME. J. Manuf. Sci. Eng. October 2013; 135(5): 051004. https://doi.org/10.1115/1.4024818
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