Rutzinger, MartinMartinRutzingerNesswetter, HelmutHelmutNesswetterLugli, PaoloPaoloLugliBett, Andreas W.Andreas W.BettZimmermann, Claus G.Claus G.Zimmermann2022-03-052022-03-052016https://publica.fraunhofer.de/handle/publica/24489810.1063/1.49548362-s2.0-84976542523The open circuit voltages Voc of individual subcells in a multijunction solar cell are measured by illuminating a given subcell with a pulse of spatially homogeneous, nearly monochromatic light with a rising edge in the ms regime. The influence of luminescent coupling and semi-transparency on Voc is eliminated by over-illuminating all subcells below this subcell with a preceding light pulse. By using a suns-Voc approach, the two-diode model dark saturation currents of each subcell are extracted. The proposed method is verified experimentally as well as through simulations on three and four-junction solar cells.enMaterialien - Solarzellen und TechnologiePhotovoltaikIII-V und Konzentrator-PhotovoltaikIII-V Epitaxie und Solarzellencellselectroluminescensecell characterisation621journal article