The challenge of screen printed Ag metallization on nano-scale poly-silicon passivated contacts for silicon solar cells

Lin Jiang; Lixin Song; Li Yan; Gregory Becht; Yi Zhang; Matthias Hoerteis

doi:10.1117/12.2273360

31 August 2017 The challenge of screen printed Ag metallization on nano-scale poly-silicon passivated contacts for silicon solar cells

Lin Jiang, Lixin Song, Li Yan, Gregory Becht, Yi Zhang, Matthias Hoerteis

Author Affiliations +

Proceedings Volume 10354, Nanoengineering: Fabrication, Properties, Optics, and Devices XIV; 103541D (2017) https://doi.org/10.1117/12.2273360
Event: SPIE Nanoscience + Engineering, 2017, San Diego, California, United States

Abstract

Passivated contacts can be used to reduce metal-induced recombination for higher energy conversion efficiency for silicon solar cells, and are obtained increasing attentions by PV industries in recent years. The reported thicknesses of passivated contact layers are mostly within tens of nanometer range, and the corresponding metallization methods are realized mainly by plating/evaporation technology. This high cost metallization cannot compete with the screen printing technology, and may affect its market potential comparing with the presently dominant solar cell technology. Very few works have been reported on screen printing metallization on passivated contact solar cells. Hence, there is a rising demand to realize screen printing metallization technology on this topic. In this work, we investigate applying screen printing metallization pastes on poly-silicon passivated contacts. The critical challenge for us is to build low contact resistance that can be competitive to standard technology while restricting the paste penetrations within the thin nano-scale passivated contact layers. The contact resistivity of 1.1mohm-cm² and the open circuit voltages > 660mV are achieved, and the most appropriate thickness range is estimated to be around 80~150nm.

Citation Download Citation

Lin Jiang, Lixin Song, Li Yan, Gregory Becht, Yi Zhang, and Matthias Hoerteis "The challenge of screen printed Ag metallization on nano-scale poly-silicon passivated contacts for silicon solar cells", Proc. SPIE 10354, Nanoengineering: Fabrication, Properties, Optics, and Devices XIV, 103541D (31 August 2017); https://doi.org/10.1117/12.2273360

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