Antimony Identified as Promising Dopant for Czochralski Silicon Wafers in Solar Cells
Research from the Australian National University and Longi reveals that antimony, phosphorus, and gallium demonstrate uniform doping profiles in Czochralski silicon wafers, with antimony showing superior axial uniformity. The study indicates antimony's potential to become the dominant dopant for high-efficiency solar cells due to its low radial dopant variation and stable axial distributions.
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A research team from the Australian National University and Longi has identified antimony (Sb) as a strong candidate dopant for Czochralski (RCz) silicon wafers, demonstrating highly uniform radial concentration profiles critical for solar cell efficiency. The study assessed doping concentrations using photoluminescence (PL) imaging and found that Sb-doped wafers exhibit excellent axial uniformity and bulk quality.
Central irregularities linked to buoyancy-driven convection were noted, with Sb showing the highest central inhomogeneities due to its properties. Radial dopant concentrations varied less than 10%, with Sb-doped wafers maintaining stable axial distributions. These findings suggest that RCz technique can produce silicon wafers with low radial dopant variation, positioning antimony as a viable option for next-generation photovoltaic devices.
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