title: Why can't I measure the external quantum efficiency of the Ge subcell of my multijunction solar cell? creator: Barrigón Montañés, Enrique creator: Espinet González, Pilar creator: Contreras, Yedileth creator: Rey Llorente, Ignacio del subject: Electronics subject: Telecommunications description: 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. rights: https://creativecommons.org/licenses/by-nc-nd/3.0/es/ date: 2015-04 type: info:eu-repo/semantics/conferenceObject type: Presentation at Congress or Conference source: AIP Conference Proceedings | 11th International Conference on Concentrator Photovoltaic Systems: CPV-11 | 13/04/2015 - 15/04/ 2015 | Aix-les-Bains, France type: PeerReviewed format: application/pdf language: eng relation: info:eu-repo/grantAgreement/EC/FP7/607153 relation: info:eu-repo/grantAgreement/MINECO//TEC2012-3728 relation: info:eu-repo/grantAgreement/MINECO//RTC-2014-2304-3 relation: info:eu-repo/grantAgreement/MINECO//TEC2011-28639-C02- 01 rights: info:eu-repo/semantics/openAccess relation: info:eu-repo/semantics/altIdentifier/doi/10.1063/1.4931510 identifier: https://oa.upm.es/40905/