TY - CONF UR - https://oa.upm.es/40905/ EP - 1-050002-6 SP - 050002 ID - upm40905 TI - Why can't I measure the external quantum efficiency of the Ge subcell of my multijunction solar cell? T2 - 11th International Conference on Concentrator Photovoltaic Systems: CPV-11 VL - 1679 N2 - The measurement of the external quantum efficiency (EQE) of low bandgap subcells in a multijunction solar cell can be sometimes problematic. In particular, this paper describes a set of cases where the EQE of a Ge subcell in a conventional GaInP/GaInAs/Ge triple-junction solar cell cannot be fully measured. We describe the way to identify each case by tracing the I-V curve under the same light-bias conditions applied for the EQE measurement, together with the strategies that could be implemented to attain the best possible measurement of the EQE of the Ge subcell. Y1 - 2015/04// AV - public M2 - Aix-les-Bains, France SN - 0094-243X A1 - Barrigón Montañés, Enrique A1 - Espinet González, Pilar A1 - Contreras, Yedileth A1 - Rey Llorente, Ignacio del ER -