Helmers, HenningHenningHelmersLopez, E.E.LopezHöhn, OliverOliverHöhnLackner, DavidDavidLacknerSchön, JonasJonasSchönSchauerte, MeikeMeikeSchauerteSchachtner, MichaelMichaelSchachtnerDimroth, FrankFrankDimrothBett, Andreas W.Andreas W.Bett2022-03-062022-03-062021https://publica.fraunhofer.de/handle/publica/27084010.1002/pssr.202170026A thin-film GaAs/AlGaAs rear-heterojunction photonic power converter with a back reflector is presented by Henning Helmers and co-workers in article number 2100113. Photon recycling is leveraged to increase the excess carrier density and consequently the output voltage. Optical resonance yields highest absorptance for near-bandgap photons. Thereby thermalization losses are minimized without compromising minimal transmission. A photovoltaic conversion efficiency of 68.9% for 858 nm monochromatic light is demonstrated.enPhotovoltaikIII-V- und Konzentrator-PhotovoltaikIII-V Epitaxie und SolarzellenPower-by-Light621530697journal article