Why can’t I measure the external quantum efficiency of the Ge subcell of my multijunction solar cell?
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.
- Instituto de Energía Solar, Universidad Politécnica de Madrid ETSI de Telecomunicación, Avd. Complutense 30, 28040 Madrid (Spain)
- Publication Date:
- OSTI Identifier:
- Resource Type:
- Journal Article
- Resource Relation:
- Journal Name: AIP Conference Proceedings; Journal Volume: 1679; Journal Issue: 1; Conference: CPV-11: 11. international conference on conventrator photovoltaictaic systems, Aix-les-Bains (France), 13-15 Apr 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
- Country of Publication:
- United States
- 36 MATERIALS SCIENCE; ELECTRIC CONDUCTIVITY; ENERGY GAP; GALLIUM COMPOUNDS; GERMANIUM; HETEROJUNCTIONS; INDIUM ARSENIDES; INDIUM PHOSPHIDES; QUANTUM EFFICIENCY; SOLAR CELLS; VISIBLE RADIATION