Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 179, Issue -, Pages 129-135Publisher
ELSEVIER
DOI: 10.1016/j.solmat.2017.11.003
Keywords
Printable silicon; Out diffused emitters; Local doping; Back-contact solar cell
Funding
- Evonik Creavis GmbH
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We demonstrate the application of a liquid-processed doped silicon precursor as a doping source for the fabrication of interdigitated back contact solar cells. We integrate phosphorus- as well as boron-doped liquid silicon in our n-type interdigitated back contact cell process based on laser-structuring. The cell with the phosphorus back surface field from liquid silicon has an efficiency of 20.9% and the cell with the boron emitter from liquid silicon has an efficiency of 21.9%. We measure saturation current densities of 34 fA cm(-2) on phosphorus-doped layers with a sheet resistance of 108 Omega/sq and 18 fA cm(-2) on boron-doped layers with a sheet resistance of 140 Omega/sq using passivated test samples.
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