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

: Lopez, E.; Höhn, O.; Schauerte, M.; Lackner, D.; Schachtner, M.; Reichmuth, S.K.; Helmers, H.

Fulltext urn:nbn:de:0011-n-6378570 (504 KByte PDF)
MD5 Fingerprint: 1f899753c80196a8122eda1761a84627
Created on: 3.8.2021

3rd Optical Wireless and Fiber Power Transmission Conference, OWPT 2021. Technical Digest : Online, Japan, April 19 - 22, 2021, OPTICS & PHOTONICS International Congress, OPIC 2021
Osaka: Laser Society of Japan, 2021
Optical Wireless and Fiber Power Transmission Conference (OWPT) <3, 2021, Online>
Optics and Photonics International Congress (OPIC) <2021, Online>
Conference Paper, Electronic Publication
Fraunhofer ISE ()
Photovoltaik; multijunction; photonic power; Photovoltaik; III-V- und Konzentrator-Photovoltaik; III-V Epitaxie und Solarzellen; Power-by-Light

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.