Browsing NTNU Open by Author "Martinsen, Fredrik A"

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    • Bulk fabrication and properties of solar grade silicon microwires 

      Martinsen, Fredrik A; Ballato, John; Hawkins, Thomas A.; Gibson, Ursula (Journal article; Peer reviewed, 2014)
      We demonstrate a substrate-free novel route for fabrication of solar grade silicon microwires for photovoltaic applications. The microwires are fabricated from low purity starting material via a bulk molten-core fibre ...

    • Reversal of the negative natural aging effect in Al-Mg-Si alloys 

      Martinsen, Fredrik A; Ehlers, Flemming J H; Torsæter, Malin; Holmestad, Randi (Journal article, 2012)
      The effect of solute clustering on subsequent precipitation has been investigated for three different Al–Mg–Si alloys with similar Mg/Si ratios but different Mg + Si contents. Hardness measurements were carried out (i) ...

    • Silicon-core glass fibres as microwire radial-junction solar cells 

      Martinsen, Fredrik A; Smeltzer, Benjamin; Nord, Magnus Kristofer; Hawkins, Thomas A.; Ballato, John; Gibson, Ursula (Journal article; Peer reviewed, 2014)
      Vertically aligned radial-junction solar cell designs offer potential improvements over planar geometries, as carrier generation occurs close to the junction for all absorption depths, but most production methods still ...