F. Frühauf, Yassine Sayad and O. Breitenstein (2016) Description of the local series resistance of real solar cells by separate horizontal and vertical components. Solar Energy Materials and Solar Cells , 154(September 2016), 23–34, ScienceDirect
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Abstract
All previous concepts for describing the effective local series resistance of really existing solar cells, as it
can be measured e.g. by luminescence imaging, try to describe it by a single local number. In solar cells
showing an inhomogeneous saturation current density, this results in different series resistance images
for the dark and illuminated case. The reason is the distributed character of the series resistance and the
different diode current profiles under these different conditions. In this work the well-known finite
element concept is used for describing a solar cell, which contains separate resistors carrying horizontal
and vertical currents. A strategy is proposed how to fit these resistors to results of electroluminescence
and lock-in thermography images of a real solar cell, leading to separate images of the local horizontal
grid resistance, which may also show broken gridlines, and the local vertical' lumped emitter contact
resistance’. The latter lumps all resistive inhomogeneities of the cell, caused by a possibly inhomoge-
neous contact-,emitter-,grid-,bulk-, and back contact resistance. It will be shown that this description of
the local series resistance reasonably describes both the dark and illuminated case,even in inhomoge-
neous multicrystalline silicon solar cells.
can be measured e.g. by luminescence imaging, try to describe it by a single local number. In solar cells
showing an inhomogeneous saturation current density, this results in different series resistance images
for the dark and illuminated case. The reason is the distributed character of the series resistance and the
different diode current profiles under these different conditions. In this work the well-known finite
element concept is used for describing a solar cell, which contains separate resistors carrying horizontal
and vertical currents. A strategy is proposed how to fit these resistors to results of electroluminescence
and lock-in thermography images of a real solar cell, leading to separate images of the local horizontal
grid resistance, which may also show broken gridlines, and the local vertical' lumped emitter contact
resistance’. The latter lumps all resistive inhomogeneities of the cell, caused by a possibly inhomoge-
neous contact-,emitter-,grid-,bulk-, and back contact resistance. It will be shown that this description of
the local series resistance reasonably describes both the dark and illuminated case,even in inhomoge-
neous multicrystalline silicon solar cells.
Information
| Item Type | Journal |
|---|---|
| Divisions |
» Faculty of Science and Technology |
| ePrint ID | 682 |
| Date Deposited | 2017-03-03 |
| Further Information | Google Scholar |
| URI | https://univ-soukahras.dz/en/publication/article/682 |
BibTex
@article{uniusa682,
title={Description of the local series resistance of real solar cells by separate horizontal and vertical components},
author={F. Frühauf, Yassine Sayad and O. Breitenstein},
journal={Solar Energy Materials and Solar Cells}
year={2016},
volume={154},
number={September 2016},
pages={23–34},
publisher={ScienceDirect}
}
title={Description of the local series resistance of real solar cells by separate horizontal and vertical components},
author={F. Frühauf, Yassine Sayad and O. Breitenstein},
journal={Solar Energy Materials and Solar Cells}
year={2016},
volume={154},
number={September 2016},
pages={23–34},
publisher={ScienceDirect}
}