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  4. Potential analysis of a rear-side passivation for multi-junction space solar cells based on germanium substrates
 
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2018
Conference Paper
Title

Potential analysis of a rear-side passivation for multi-junction space solar cells based on germanium substrates

Abstract
For future 4-junction Ge based multi-junction solar cells, the current generated in the Ge sub-cell gets very important. We developed an efficient rear-side passivation stack, which results in minority carrier lifetimes (teff) ≈ 200 ms and investigated its performance in an accelerated aging experiment (1 MeV electron irradiation). The aging caused a strong lifetime decrease down to teff = 4 ms, whereas the carrier mobility stayed constant. These experimental values provide the basis for Beginning-of-Life and End-of-Life solar cell simulations, which show that the potential of the rear-side passivation for 3-junction solar-cell performance is limited, but very promising for 4-junction solar cells.
Author(s)
Weiss, Charlotte  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Schön, Jonas  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Höhn, Oliver  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Mohr, Christian
Fraunhofer-Institut für Solare Energiesysteme ISE  
Kurstjens, Rufi
Umicore Electro-optic Materials
Boizot, Bruno
Université Paris-Saclay
Janz, Stefan  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Mainwork
IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018  
Project(s)
SiLaSpaCe  
Funder
European Commission EC  
Conference
Photovoltaic Specialists Conference (PVSC) 2018  
Photovoltaic Specialists Conference (PVSC) 2018  
Photovoltaic Science and Engineering Conference (PVSEC) 2018  
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) 2018  
Open Access
DOI
10.24406/publica-r-401436
10.1109/PVSC.2018.8547334
File(s)
N-507115.pdf (518.08 KB)
Language
English
Fraunhofer-Institut für Solare Energiesysteme ISE  
Keyword(s)
  • III-V solar cell

  • passivation

  • germanium

  • lifetime measurement

  • solar cell simulation

  • space solar cell

  • electron irradiation

  • Photovoltaik

  • III-V und Konzentrator-Photovoltaik

  • III-V Epitaxie und Solarzellen

  • solar cells

  • measurement

  • cell simulation

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