%0 Conference Paper
%A Barrigón Montañés, Enrique
%A Espinet González, Pilar
%A Contreras, Yedileth
%A Rey Llorente, Ignacio del
%B 11th International Conference on Concentrator Photovoltaic Systems: CPV-11
%C Aix-les-Bains, France
%D 2015
%F upm:40905
%P 050002-1-050002-6
%R 10.1063/1.4931510
%T Why can't I measure the external quantum efficiency of the Ge subcell of my multijunction solar cell?
%U https://oa.upm.es/40905/
%V 1679
%X 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.