Fabrication and Characterization of Catalyzed and Metal-free Low-temperature Si Nanowires for Flexible Devices and Photovoltaic Solar Cells (Contributo in atti di convegno)

Type
Label
  • Fabrication and Characterization of Catalyzed and Metal-free Low-temperature Si Nanowires for Flexible Devices and Photovoltaic Solar Cells (Contributo in atti di convegno) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Alternative label
  • Spinella C, Nicotra G, Bongiorno C, Convertino A, Cuscuna' M, Martelli F (2010)
    Fabrication and Characterization of Catalyzed and Metal-free Low-temperature Si Nanowires for Flexible Devices and Photovoltaic Solar Cells
    in MRS Fall Meeting: Symposium AA: Group IV Semiconductor Nanostructures and Applications, Boston, USA
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Spinella C, Nicotra G, Bongiorno C, Convertino A, Cuscuna' M, Martelli F (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • Metal-free and Au-catalyzed Silicon nanowires (Si-NWs) grown at low temperatures have been analyzed through transmission electron microscopy (TEM) and scanning electron microscopy (SEM), and their crystalline phase studied. All the observed nanowire are growth on silicon dioxide and show two different growth direction, i.e., <110> and <112> , both showing high density of planar defects, such as stacking faults (SFs) and twins. The dependence of the defects orientation with the NWs growth direction has been pointed out. Moreover has been observed that metal-free Si NWs show a mono-crystalline diamond structure affected by the presence of discontinuous and short SFs. As for the Au-catalyzed Si-NWs instead, plan-view together with cross sectional TEM analysis have been performed show the presence of radial twin boundaries with random stacked nano-polytypes in the <110> growth direction case. High density of SFs along the growth direction are instead observed in the in the <112> oriented NWs, who may precipitate in a different polytype such as the rhombohedral 9R. The formation mechanism of the 9R instead of other more stable polytype will suggested. (literal)
Titolo
  • Fabrication and Characterization of Catalyzed and Metal-free Low-temperature Si Nanowires for Flexible Devices and Photovoltaic Solar Cells (literal)
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