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Quantification of electroluminescence measurements on modules

: Fruehauf, F.; Turek, M.

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Energy Procedia 77 (2015), pp.63-68
ISSN: 1876-6102
International Conference on Crystalline Silicon Photovoltaics (SiliconPV) <5, 2015, Constance>
Journal Article, Conference Paper, Electronic Publication
Fraunhofer CSP ()

A non-destructive measurement technique is presented which yields cell parameters of individual solar cells of a photovoltaic module. Our method is based on the quantitative analysis of voltage dependent electroluminescence images together with the current-voltage-characteristic of the complete module. As a result, we obtain the ideality factors n(1,2) and loss current densities J(01,02) of individual cells connected in series. The applicability of our approach is demonstrated on numerical and experimental data.