Screen pattern simulation for an improved front‐side Ag‐electrode metallization of Si‐solar cells

Sebastian Tepner; Linda Ney; Michael Linse; Andreas Lorenz; Maximilian Pospischil; Kenji Masuri; Florian Clement

doi:10.1002/pip.3313

journal article Open Access Jul 13, 2020

Screen pattern simulation for an improved front‐side Ag‐electrode metallization of Si‐solar cells

Sebastian Tepner

Linda Ney Michael Linse Andreas Lorenz Maximilian Pospischil Kenji Masuri Florian Clement

Progress in Photovoltaics: Research and Applications Vol. 28 No. 10 pp. 1054-1062 · Wiley

View at Publisher Save 10.1002/pip.3313

Abstract

AbstractFlatbed screen printing proves to be the dominant metallization approach for mass production of silicon (Si)‐solar cells because of its robust and cost‐effective production capability. However, the ongoing demand of the PV industry to further decrease the width of printed Ag‐electrodes (contact fingers) requires new optimizations. This study presents the latest results on Si‐solar cell metallization using fine‐line screens down to screen opening widths of wn = 15 μm. The best experimental group achieved a record finger geometry with a mean finger width of wf = 19 μm and a mean finger height of hf = 18 μm. Furthermore, solar cell performance using a front‐side grid with a screen opening width of wn = 24 μm is investigated, reporting cell efficiencies up to 22.1% for Passivated Emitter and Rear Contact (PERC) solar cells. Finally, a novel screen pattern simulation is presented, revealing a correlation between the measured lateral finger resistance and the novel dimensionless parameter screen utility index (SUI). It describes the ratio between the average size of individual openings defined by the screen mesh angle and the chosen underlying mesh type. For SUI < 1, the printing result will strongly depend on the screen configuration, whereas for values of SUI > 1, the impact of the screen on the overall printability diminishes.

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References

25

[1]

10.1016/j.solmat.2019.109969

[2]

TepnerS NeyL LinseM LorenzA PospischilM.Advances in Screen Printed Metallization for Si‐Solar Cells–Towards Ultra‐fine Line Contact Fingers Below 20 μm.29th International PV Science and Engineering Conference Xi'an China2019 DOI:https://doi.org/10.13140/RG.2.2.33088.69126

[3]

LorenzA LinseM FrintrupH JeitlerM MetteA LehnerM GreutmannR BrockerH KönigM ErathD ClementF.Screen printed thick film metallization of silicon solar cells—recent developments and future perspectives.35th European Photovoltaic Solar Energy Conference and Exhibition2018: 819–24 DOI:https://doi.org/10.4229/35THEUPVSEC20182018-2DV.3.65

[4]

International technology roadmap for photovoltaic.3rd edition: 2011 Results. ITRPV2012.

[5]

International technology roadmap for photovoltaic.10th edition: 2018 Results. ITRPV2019.

[6]

10.1016/j.solmat.2008.10.021

[7]

10.1016/j.mssp.2014.08.023

[8]

10.3390/coatings8110406

[9]

10.1007/s11998-018-0091-2

[10]

10.1108/09540910210416422

[11]

HoornstraJ WeeberAW De Moor Hugo H. C. SinkeWC.The importance of paste rheology in improving fine line thick film screen printing of front side metallization.14th European Photovoltaic Solar Energy Conference and Exhibition1997.

[12]

10.1016/j.matdes.2009.09.051

[13]

10.1109/jphotov.2016.2626147

[14]

10.1109/jphotov.2014.2388073

[15]

AokiM NakamuraK TachibanaT SumitaI HayashiH AsadaH OhshitaY.30μm fine‐line printing for solar cells.IEEE 39th Photovoltaic Specialists2013: 2162–6 DOI:https://doi.org/10.1109/PVSC.2013.6744903 10.1109/pvsc.2013.6744903

[16]

Hahne P (2000)

[17]

10.3390/coatings5020172

[18]

10.1016/j.solmat.2012.01.018

[19]

10.1109/jphotov.2019.2959939

[20]

10.1109/pvsc.2018.8548158

[21]

ZhangY.Knotless screen printing for crystalline silicon solar cells. Konstanz; October 23rd 2017.

[22]

10.1063/1.5125871

[23]

StrauchT DemantM LorenzA HaunschildJ ReinS.Two image processing tools to analyse alkaline texture and contact finger geometry in microscope images.29th European Photovoltaic Solar Energy Conference and Exhibition2014.

[24]

ClementF LinseM TepnerS WengenmeyrN NeyL KriegK LorenzA PospischilM BechmannS OehrleK SteckemetzS PreuR."Project FINALE"—screen and screen printing process development for ultra‐fine‐line contacts below 20μm finger width.36th EU PVSEC Conference Proceedings2019: 259–62 DOI:https://doi.org/10.4229/EUPVSEC20192019-2DO.5.1

[25]

FraunhoferISE.Press release: innovative fine‐line screen printing metallization reduces silver consumption for solar cell contacts. Available at:https://www.ise.fraunhofer.de/en/press‐media/press‐releases/2019/innovative‐fine‐line‐screen‐printing‐metallization‐reduces‐silver‐consumption‐for‐solar‐cell‐contacts.html;2019.

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Details

Published: Jul 13, 2020
Vol/Issue: 28(10)
Pages: 1054-1062
License: View

Authors

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Sebastian Tepner