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  4. Fast atom beam-activated n-Si/n-GaAs wafer bonding with high interfacial transparency and electrical conductivity
 
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2013
Journal Article
Title

Fast atom beam-activated n-Si/n-GaAs wafer bonding with high interfacial transparency and electrical conductivity

Abstract
Optically transparent, electrically conductive n-Si/n-GaAs direct wafer bonds are achieved by athorough optimization of surface conditioning using fast atom beams. Bonding at room temperature under high-vacuum conditions is systematically investigated after in situ surface deoxidization using either argon or helium fast atom beams. Using argon, high bond energies of up to 900 mJ/m2 areobtained and further enhanced to achieve bulk strength through rapid annealing at 290 C, thereby enabling the production of thermally stable and mechanically robust hybrid substrates. Moreover, the interface conductivity is significantly improved by an additional thermal annealing at 400 C. Although it is anticipated to induce higher quality interfaces, helium treatment yields, however, limited and unstable bonding. This difference is attributed to an important surface nano-texturing that occurs during fast atom beam processing, a phenomenon that is peculiar to helium and absent in argon treatment.
Author(s)
Essig, S.
Fraunhofer-Institut für Solare Energiesysteme ISE  
Moutanabbir, O.
Department of Engineering Physics, École Polytechnique de Montréal, Canada
Wekkeli, A.
Fraunhofer-Institut für Solare Energiesysteme ISE  
Nahme, H.
Fraunhofer-Institut für Kurzzeitdynamik Ernst-Mach-Institut EMI  
Oliva, E.
Fraunhofer-Institut für Solare Energiesysteme ISE  
Bett, A.W.
Fraunhofer-Institut für Solare Energiesysteme ISE  
Dimroth, F.
Fraunhofer-Institut für Solare Energiesysteme ISE  
Journal
Journal of applied physics  
Open Access
File(s)
Download (2.3 MB)
DOI
10.24406/publica-r-232577
10.1063/1.4807905
Language
English
Fraunhofer-Institut für Kurzzeitdynamik Ernst-Mach-Institut EMI  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Keyword(s)
  • Materialien - Solarzellen und Technologie

  • III-V und Konzentrator-Photovoltaik

  • Farbstoff

  • Organische und Neuartige Solarzellen

  • Alternative Photovoltaik-Technologien

  • III-V Epitaxie und Solarzellen

  • Tandemsolarzellen auf kristallinem Silicium

  • Solarzellen und Bauelemente

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