Details
| Original language | English |
|---|---|
| Article number | 111304 |
| Journal | Solar Energy Materials and Solar Cells |
| Volume | 231 |
| Early online date | 2 Aug 2021 |
| Publication status | Published - Oct 2021 |
Abstract
We review the famous Cox & Strack equation that is commonly applied in contact resistance measurements of samples with a negligible contact resistance at the sample backside. We apply geometric interpretations to extend the Cox & Strack model a) to samples that have a non-negligible contact resistance not only on the front- but also on the back-side and b) to junctions with a buried contact resistance underneath a conductive layer. Case a) is for example a symmetric sample with a single material junction on both sample surfaces. Case b) could be a poly-Si/SiOx/c-Si or a-Si/c-Si hetero-junction. We compare our analytic treatment with rigorous finite-element simulations and find a relative agreement between 2.5 % and 36 % depending on the sample geometry and resistance values. We apply the method to analyze the contact resistance of lifetime samples with both-sided n+/n-type poly-Si junctions.
Keywords
- Contact resistivity, Photovoltaics, Selective contacts, Silicon, Spreading resistance
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- Surfaces, Coatings and Films
Sustainable Development Goals
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In: Solar Energy Materials and Solar Cells, Vol. 231, 111304, 10.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Extended Cox & Strack analysis for the contact resistance of planar samples with carrier-selective junctions on both sides
AU - Folchert, Nils
AU - Brendel, Rolf
N1 - Funding Information: We thank Jimmy Melskens from TU Eindhoven for fruitful discussions. This work was supported by the Ministry for Science and Culture of lower Saxony (project vOx) and by the Federal Ministry for Economic Affairs and Energy under grant no 0324171C (project Nextstep).
PY - 2021/10
Y1 - 2021/10
N2 - We review the famous Cox & Strack equation that is commonly applied in contact resistance measurements of samples with a negligible contact resistance at the sample backside. We apply geometric interpretations to extend the Cox & Strack model a) to samples that have a non-negligible contact resistance not only on the front- but also on the back-side and b) to junctions with a buried contact resistance underneath a conductive layer. Case a) is for example a symmetric sample with a single material junction on both sample surfaces. Case b) could be a poly-Si/SiOx/c-Si or a-Si/c-Si hetero-junction. We compare our analytic treatment with rigorous finite-element simulations and find a relative agreement between 2.5 % and 36 % depending on the sample geometry and resistance values. We apply the method to analyze the contact resistance of lifetime samples with both-sided n+/n-type poly-Si junctions.
AB - We review the famous Cox & Strack equation that is commonly applied in contact resistance measurements of samples with a negligible contact resistance at the sample backside. We apply geometric interpretations to extend the Cox & Strack model a) to samples that have a non-negligible contact resistance not only on the front- but also on the back-side and b) to junctions with a buried contact resistance underneath a conductive layer. Case a) is for example a symmetric sample with a single material junction on both sample surfaces. Case b) could be a poly-Si/SiOx/c-Si or a-Si/c-Si hetero-junction. We compare our analytic treatment with rigorous finite-element simulations and find a relative agreement between 2.5 % and 36 % depending on the sample geometry and resistance values. We apply the method to analyze the contact resistance of lifetime samples with both-sided n+/n-type poly-Si junctions.
KW - Contact resistivity
KW - Photovoltaics
KW - Selective contacts
KW - Silicon
KW - Spreading resistance
UR - http://www.scopus.com/inward/record.url?scp=85111577132&partnerID=8YFLogxK
U2 - 10.1016/j.solmat.2021.111304
DO - 10.1016/j.solmat.2021.111304
M3 - Article
AN - SCOPUS:85111577132
VL - 231
JO - Solar Energy Materials and Solar Cells
JF - Solar Energy Materials and Solar Cells
SN - 0927-0248
M1 - 111304
ER -