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Development of Cost-Effective Silver Alloy Front-Side Paste for Si Solar Cells
D. Corbett, A. Savidis, R. Goodall, J. Corteen, E. Raj, S. Johnson, R. Orman, G. Kerr
Wafer-Based Silicon Solar Cells and Materials Technology
Subtopic: Silicon Solar Cells Improvements and Innovation
Event: 32nd European Photovoltaic Solar Energy Conference and Exhibition
Session: 2AV.1.4
589 - 591
ISBN: 3-936338-41-8
Paper DOI: 10.4229/EUPVSEC20162016-2AV.1.4
0,00 EUR
Document(s): paper, poster


Pure silver is used in conventional solar cells for front-side current collection as it exhibits high conductivity, excellent solderability and good oxidation resistance. The long term cost of silver is expected to continue to rise therefore it is important to reduce silver content in solar cells. Previous attempts to use metal additives to reduce the quantity of pure silver required have resulted in alloys with poor resistivity and/or poor oxidation resistance. This study presents a collaborative research project to develop a lower cost alternative to pure silver using a novel developmental approach to selecting, producing and testing alloys of silver. Multivariable regression techniques were used to predict the properties of binary and tertiary silver alloy systems. Samples were converted to fine powders by gas atomisation and mixed with glass frits to produce pastes. Laboratory measurements of line and contact resistance were duplicated in a solar manufacturing line and screen printed cells produced. The consortium aims to produce an 18% efficient solar cell using an optimised alloy system.