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Swee Hoe Lim, Jing-Jing Li, Elizabeth H. Steenbergen and Yong-Hang Zhang Luminescence coupling effects on multijunction solar cell external quantum efficiency measurement Progress in Photovoltaics: Research and Applications 21

Article first published online: 30 NOV 2011 | DOI: 10.1002/pip.1215

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The external quantum efficiency (EQE) of the InGaAs subcell of an InGaP/InGaAs/Ge multijunction solar cell was measured under varying light bias conditions. The effect of luminescence coupling due to radiative emission from the InGaP subcell caused artifacts in the InGaAs subcell EQE measurement. The effect was modeled using small signal analysis and measured by detecting the luminescence from the InGaP subcell to explain in detail the origin of this effect and how it affects the EQE measurement.

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