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Catalyst formation and growth of Sn- and In-catalyzed silicon nanowires

  • Irene Ngo (a1), Benedict O'Donnell (a2), José Alvarez (a3), Marie Gueunier-Farret (a4), Jean-Paul Kleider (a5), Linwei Yu (a6) and Pere Roca i Cabarrocas (a7)...

Abstract

Silicon nanowires (Si NWs) were grown directly on transparent conductive oxide layers using a single pump down process in a plasma enhanced chemical vapour deposition (PECVD) system. Layers of ITO and SnO2 on glass substrates were exposed to a hydrogen plasma leading to the reduction of the oxide and to the agglomeration of the metal into catalyst droplets of a few tens of nanometers diameter. The diameter and the density of the nanowires depend on the catalysts droplets size and density, we studied step by step the evolution of the surface prior to and at the initial stage of the nanowire growth. The catalyst droplets size and distribution were essentially investigated through Scanning Electron Microscopy (SEM).

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