Evaluation and Optimization of Grid Patterns of Silicon Solar Cells by Diode and Series Resistance Model

Abstract:

Series resistance in solar cell is known to be one of the key factors which need to be optimized, especially through the design of the front pattern. This paper is the utilization of the improved diode and series resistance model to represent the solar cell. The results show: three buses are suitable for high square resistance and fine grid line. Plating technology can improve the absolute conversion efficiency over 17%. In addition, 71 fingers for three buses and 76 fingers for two buses were select in production. It is imagined that the proposed model is very useful for PV professionals who require simple, fast and accurate PV model to design their cells.

• Periodical: Advanced Materials Research (Volume 529)
• Pages: 53-58
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.529.53
• Online since: June 2012
• Authors: Sheng Kai Fan, Jia Xuan Liao, Xiong Bang Wei, Sheng Hua Hu, Jian Yu
• Keywords: Crystalline Silicon Solar Cells, Diode Model, Grid Patterns, Series Resistance Model

References

[1] M. M. Hilali: Understanding and development of manufacturable screen-printed contacts on high sheet-resistance emitters for low-cost silicon solar cells, PhD Thesis, Georgia Institute of Technology, 2005, pp.124-126.

[2] N. K. Annamalai, R. F. Blanchard, J. F. Bockman: A numerical method to optimize collector grids, in Eighth Biennial University/Government/Industry Microelectronics Symposium, 1989. Proceedings, pp.205-210.

DOI: 10.1109/ugim.1989.37336

[3] .

[3] R. Jalali, E. Faizabadi, F. Behafarid: The Modeling Front Contact Metallization Grid Pattern for Multi Crystalline Silicon Solar Cell. in Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on (2007).

DOI: 10.1109/icimw.2007.4516577

[4] G. de Mey, P. de Visschere: Grid contacts on solar cells, Nieuw archief Wiskunde, IV(1) , 1983, pp.270-289.

[5] U. Gangopadhyay, H. Saha, S. K. Dutta: Front grid design for plated contact solar cells. in Photovoltaic Specialists Conference, 2002. Conference Record of the Twenty-Ninth IEEE (2002), pp.399-402.

DOI: 10.1109/pvsc.2002.1190543

[6] A. Luque: Solar cells and optics for photovoltaic concentration, chapter, 4, Adam Hilger series on optics and optoelectronics(1989).

[7] L.J. Caballero, A. Martinez, P. Sanchez-Friera: Front grid design in industrial silicon solar cells: modeling to evaluate the behavior of three vs. two buses cell patterns, IEEE (2008).

DOI: 10.1109/pvsc.2008.4922435

[8] L.J. Caballero: Contact definition in industrial silicon solar cells, Solar Energy, 2010, pp.385-386.

[9] M. A. Green: Solar cells—operating principles technology and system applications, The University of New South Wales, 1986, pp.147-155.

[10] T. Falcon: Ultra Fine Line Printing for Silicon Solar Cells. Mesh Screens or Metal Stencils?, 3rd Workshop on Metallization for Crystalline Silicon Solar Cells, Charleroi(2011).

[11] S. Wenham: Buried-Contact Si Solar Cells, Progress in Photovoltaics: Research and Applications, 1(1993), pp.3-10.

[12] Jinyun Wei: An approximately exponential characteristic of efficiency and series resistance of solar cells, Acta Energiae Solaris Sinica, 25(2004), pp.356-358.