Effect of gravity on the microstructure of Al-Si alloy for rear-passivated solar cells
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| Type of Publication: | Journal article |
| Author: | Urrejola, Elias; Peter, Kristian; Plagwitz, Heiko; Schubert, Gunnar |
| Year of publication: | 2011 |
| Published in: | Journal of Applied Physics ; 110 (2011), 5. - 056104. - ISSN 0021-8979 |
| DOI (citable link): | https://dx.doi.org/10.1063/1.3633510 |
| Summary: |
We study the influence of the gravity field orientation on the microstructure of Al–Si forming alloy. Due to the difference between the diffusivity of aluminum and silicon, Kirkendall void formations are normally found at the back of rear-passivated solar cells instead of an eutectic layer. We show that the voids may partially be avoided by sintering the samples with the solid/liquid interface oriented opposite to the direction of the gravity field. A local back-surface-field is found underneath the voids using this approach. This phenomenon strongly applies to rear-passivated so- lar cells, which exhibited strong fill factor losses.
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| Subject (DDC): | 530 Physics |
| Keywords: | solar cells, silicon alloys, aluminum, aluminium, alloys, compounds, gravity, sintering, contact resistance, chemical interdiffusion, firing (materials), dielectric thin films, passivation, protective coating, scanning electron microscopy, back-surface-field, voids (solid), kirkendall effect |
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URREJOLA, Elias, Kristian PETER, Heiko PLAGWITZ, Gunnar SCHUBERT, 2011. Effect of gravity on the microstructure of Al-Si alloy for rear-passivated solar cells. In: Journal of Applied Physics. 110(5), 056104. ISSN 0021-8979. Available under: doi: 10.1063/1.3633510
@article{Urrejola2011Effec-19494, title={Effect of gravity on the microstructure of Al-Si alloy for rear-passivated solar cells}, year={2011}, doi={10.1063/1.3633510}, number={5}, volume={110}, issn={0021-8979}, journal={Journal of Applied Physics}, author={Urrejola, Elias and Peter, Kristian and Plagwitz, Heiko and Schubert, Gunnar}, note={Article Number: 056104} }
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