5.1.2 Modified Cell and Module Designs
• Draw on findings from PP5.1A, target device and module fabrication changes to increase the sustainable manufacturing capacity of the respective technologies, while ensuring high performance and low LCOE values.
• Investigate alternative metallisation technologies, targeting reducing silver consumption to < 2 mg/W in collaboration with SunDrive.
• Assess two-terminal tandem devices, for the unique opportunity to greatly reduce silver by a factor of up to six compared to PERC.
• Investigate sustainability issues passivating contacts the bottom-cell of silicon-based tandems, moving away from ITO.
• Investigate opportunities for changes to cell metallisation and interconnection schemes in module level technology development for both screen-printed and plated cells to assist with the reduction of key materials such as silver, lead and bismuth.
• Investigate aluminium usage with reduced-frame or frame-less modules and changes to cell configurations. The activity will also develop low-weight modules to reduce emissions associated with transportation.
• Fabricate a solar cell featuring at least one passivated contact with consumption of key materials sufficiently low to enable TW scale manufacturing
• Develop a solar cell structure featuring a transparent conductive oxide layer suitable for TW scale PV deployment
• Develop a contact geometry to reduce silver consumption down to 2 mg/W using screen-printing
• Develop low-temperature interconnection with bismuth consumption < 2 mg/W
• Develop a module-based milestone with low Al, large module, or light weight.