Current Mismatch and Luminescence Coupling in Three-junction Photonic Power Converters with and without Back Reflector

In this work the coupling process efficiency in three-junction photonic power converters based on GaAs/AlGaAs rear-heterojunction subcells is experimentally quantified. A coupling process efficiency of 32 % ± 9 % from top and middle subcells to the limiting bottom subcell is found. Furthermore, it i...

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Hauptverfasser:	Lopez, E, Höhn, O, Schauerte, M, Lackner, D, Schachtner, M, Reichmuth, S.K, Helmers, H
Format:	Tagungsbericht
Sprache:	eng
Schlagworte:	III-V Epitaxie und Solarzellen III-V- und Konzentrator-Photovoltaik multijunction photonic power Photovoltaik Power-by-Light
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Zusammenfassung:	In this work the coupling process efficiency in three-junction photonic power converters based on GaAs/AlGaAs rear-heterojunction subcells is experimentally quantified. A coupling process efficiency of 32 % ± 9 % from top and middle subcells to the limiting bottom subcell is found. Furthermore, it is shown experimentally how a back reflector affects luminescence coupling in multi-junction photonic power converters by re-directing photons that are emitted by the bottom subcell towards the upper subcells.