• English
  • Deutsch
  • Log In
    Password Login
    or
  • Research Outputs
  • Projects
  • Researchers
  • Institutes
  • Statistics
Repository logo
Fraunhofer-Gesellschaft
  1. Home
  2. Fraunhofer-Gesellschaft
  3. Konferenzschrift
  4. Pushing the Boundaries of Photovoltaic Light to Electricity Conversion: A GaAs Based Photonic Power Converter with 68.9% Efficiency
 
  • Details
  • Full
Options
2021
Conference Paper
Titel

Pushing the Boundaries of Photovoltaic Light to Electricity Conversion: A GaAs Based Photonic Power Converter with 68.9% Efficiency

Abstract
We present recent results achieved in the field of photonic power conversion, i.e. monochromatic light to electricity conversion, using photovoltaic cells. Based on a thin film processing approach we leverage photon recycling and optical resonance effects with a GaAs/AlGaAs rear-heterojunction photovoltaic cell. A back reflector yields increased effective minority carrier lifetime and, as a consequence, an increase in voltage. Optical resonance in the microcavity yields high absorptance close to bandgap despite weak absorptivity. Hence, high current is reached while thermalization losses are minimized. Maximal spectral response SR=0.653 A/W is measured at 858 nm. At this wavelength, thermalization losses diminish to only 21 meV per photon or 1.5% rel . Based on the calibrated spectral response combined with light I-V measurements under broad band and monochromatic light, we determine a maximum equivalent monochromatic power conversion efficiency at 858 nm of 68.9%±2.8%.
Author(s)
Helmers, H.
Lopez, E.
Höhn, O.
Lackner, D.
Schön, J.
Schauerte, M.
Schachtner, M.
Dimroth, F.
Bett, A.W.
Hauptwerk
48th IEEE Photovoltaic Specialists Conference, PVSC 2021
Konferenz
Photovoltaic Specialists Conference (PVSC) 2021
DOI
10.1109/PVSC43889.2021.9518920
File(s)
N-641143.pdf (276.5 KB)
Language
English
google-scholar
Fraunhofer-Institut für Solare Energiesysteme ISE
Tags
  • Photovoltaik

  • back reflector

  • microcavity

  • Optical Power Transmission

  • photonic power converter

  • photon recycling

  • Power-by-Light

  • resonance

  • thin film

  • III-V- und Konzentrator-Photovoltaik

  • III-V Epitaxie und Solarzellen

  • Cookie settings
  • Imprint
  • Privacy policy
  • Api
  • Send Feedback
© 2022