• English
  • Deutsch
  • Log In
    Password Login
    Research Outputs
    Fundings & Projects
    Researchers
    Institutes
    Statistics
Repository logo
Fraunhofer-Gesellschaft
  1. Home
  2. Fraunhofer-Gesellschaft
  3. Scopus
  4. GaAs//Si Multijunction Solar Cells Fabricated via Mechanical Stack Technology Using Pd Nanoparticles and Metal-Assisted Chemical Etching
 
  • Details
  • Full
Options
2023
Journal Article
Title

GaAs//Si Multijunction Solar Cells Fabricated via Mechanical Stack Technology Using Pd Nanoparticles and Metal-Assisted Chemical Etching

Abstract
Multijunction solar cells (MJSCs) have attracted attention as next-generation solar cells. In particular, GaAs//Si-based MJSCs are highly efficient with low cost and are expected to gain new applications, such as on-vehicle integrations. In this article, we examined a highly efficient In0.49Ga0.51P/Al0.06Ga0.94As//Si three-junction solar cell. The bottom Si cell has a tunnel oxide passivated contact structure. The key technology used to fabricate this solar cell is a stacking method that uses Pd nanoparticles (Pd-NPs) and metal-assisted chemical etching (MacEtch) for the bonding interface, which is improved from our previous 'smart stack' technology. The MacEtch method has a feature of selective etching for Si around a metal body. Pd-NPs selectively invade the Si cell through the surface of the Si oxide layer, thereby improving the bonding resistivity between the GaAs-based cell and Si cell. Further, this technology aids the management of the bonding gap width by controlling the Pd-NP invasion depth. As a result, an efficiency of 27.6% for the aperture area was attained. The proposed technology is useful for the connection of Si-based cells, enhancing the development of GaAs//Si-based tandem solar cells.
Author(s)
Makita, Kikuo
Mizuno, Hidenori
Sai, Hitoshi
Oshima, Ryuji
Shoji, Yasushi
Müller, Ralph  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Beutel, Paul  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Lackner, David  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Benick, Jan  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Hermle, Martin  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Dimroth, Frank  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Sugaya, Takeyoshi
Journal
IEEE Journal of Photovoltaics  
DOI
10.1109/JPHOTOV.2022.3215263
Language
English
Fraunhofer-Institut für Solare Energiesysteme ISE  
Keyword(s)
  • Bonding technology

  • III-V solar cells

  • mechanical stacking

  • metal-assisted chemical etching (MacEtch)

  • multijunction solar cells (MJSCs)

  • Si solar cells

  • Cookie settings
  • Imprint
  • Privacy policy
  • Api
  • Contact
© 2024