Why can’t I measure the external quantum efficiency of the Ge subcell of my multijunction solar cell?

Journal Article · Mon Sep 28 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4931523· OSTI ID:22489012

Barrigón, Enrique; Espinet-González, Pilar; Contreras, Yedileth; Rey-Stolle, Ignacio ^[1]

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1. Instituto de Energía Solar, Universidad Politécnica de Madrid ETSI de Telecomunicación, Avd. Complutense 30, 28040 Madrid (Spain)

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.

• OSTI ID: 22489012
• Journal Information: AIP Conference Proceedings, Vol. 1679, 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); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ELECTRIC CONDUCTIVITY
ENERGY GAP
GALLIUM COMPOUNDS
GERMANIUM
HETEROJUNCTIONS
INDIUM ARSENIDES
INDIUM PHOSPHIDES
QUANTUM EFFICIENCY
SOLAR CELLS
VISIBLE RADIATION