Silicon Nanorods for Novel Solar Cells

in: Applied Surface Science (2012)
Radnóczi, György Zoltán; Pécz, Béla; Array, Array; Sivakov, Vladimir; Christiansen, Silke
Silicon nanorods were produced by vapor-liquid-solid process and wet chemical etching as possible candidates for solar cell material. The nanostructures of Si nanorods formed by two different processes are investigated in transmission electron microscope and compared. The first group grown on Si substrate from silane using gold catalyst exhibits a single crystalline structure with twin boundaries and some kinks. The cross section of these rods is close to circular but faceting can be observed while the orientation of the axes of the rods shows a texture. The second group etched from bulk Si using Ag catalyst particles exhibits perfect crystalline structure and a wide distribution of thickness. The cross section of these rods is irregular, no faceting can be observed, and the shape of the cross section depends on the random arrangement of the Ag particles. The etched rods are mostly parallel to the substrate normal as it is expected.

DOI: Array

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