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Spectroscopic investigations of arrays containing vertically and horizontally aligned silicon nanowires

Volpati, Diogo LU ; Mårtensson, Niklas LU ; Anttu, Nicklas LU ; Viklund, Per LU ; Sundvall, Christian ; Åberg, Ingvar ; Bäckström, Joakim ; Olin, Håkan ; Björk, Mikael T. LU and Castillo-Leon, Jaime LU (2016) In Materials Research Express 3(12).
Abstract

The properties of nanowire arrays have been investigated mainly in comparison with isolated nanowires or thin films, owing to the difficulty in controlling the nanowire alignment. In this study, we report on arrays containing vertically or horizontally aligned silicon nanowires, whose alignment and structure were determined using x-ray diffraction and scanning electron microscopy. The Raman spectra of the nanowire arrays differ from those of isolated nanowires because of distinct heat dissipation rates of the absorbed energy from the laser, in agreement with recent theoretical calculations. The tailored alignment of the nanowires on solid substrates up to 1 inch of diameter also enabled the observation of resonance modes associated with... (More)

The properties of nanowire arrays have been investigated mainly in comparison with isolated nanowires or thin films, owing to the difficulty in controlling the nanowire alignment. In this study, we report on arrays containing vertically or horizontally aligned silicon nanowires, whose alignment and structure were determined using x-ray diffraction and scanning electron microscopy. The Raman spectra of the nanowire arrays differ from those of isolated nanowires because of distinct heat dissipation rates of the absorbed energy from the laser, in agreement with recent theoretical calculations. The tailored alignment of the nanowires on solid substrates up to 1 inch of diameter also enabled the observation of resonance modes associated with light trapped into the nanowires. This was proven by comparing the light absorbed and scattered by the arrays, and may be exploited to enhance light harvesting in tandem solar cells. Significantly, the control of the assembly of nanowire arrays may have a direct impact on bottom-up technologies of high anisotropy nanomaterials.

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author
publishing date
type
Contribution to journal
publication status
published
keywords
Anisotropy, Leaky-resonance modes, Nanostructured film, Nanowire array, Raman scattering, Silicon nanowires, Vertical self-Assembly
in
Materials Research Express
volume
3
issue
12
article number
125021
publisher
IOP Publishing
external identifiers
  • scopus:85007440104
ISSN
2053-1591
DOI
10.1088/2053-1591/3/12/125021
language
English
LU publication?
no
id
f95a536e-90df-47b2-89ce-97662ae081dd
date added to LUP
2019-05-17 14:28:32
date last changed
2020-01-13 01:49:02
@article{f95a536e-90df-47b2-89ce-97662ae081dd,
  abstract     = {<p>The properties of nanowire arrays have been investigated mainly in comparison with isolated nanowires or thin films, owing to the difficulty in controlling the nanowire alignment. In this study, we report on arrays containing vertically or horizontally aligned silicon nanowires, whose alignment and structure were determined using x-ray diffraction and scanning electron microscopy. The Raman spectra of the nanowire arrays differ from those of isolated nanowires because of distinct heat dissipation rates of the absorbed energy from the laser, in agreement with recent theoretical calculations. The tailored alignment of the nanowires on solid substrates up to 1 inch of diameter also enabled the observation of resonance modes associated with light trapped into the nanowires. This was proven by comparing the light absorbed and scattered by the arrays, and may be exploited to enhance light harvesting in tandem solar cells. Significantly, the control of the assembly of nanowire arrays may have a direct impact on bottom-up technologies of high anisotropy nanomaterials.</p>},
  author       = {Volpati, Diogo and Mårtensson, Niklas and Anttu, Nicklas and Viklund, Per and Sundvall, Christian and Åberg, Ingvar and Bäckström, Joakim and Olin, Håkan and Björk, Mikael T. and Castillo-Leon, Jaime},
  issn         = {2053-1591},
  language     = {eng},
  month        = {12},
  number       = {12},
  publisher    = {IOP Publishing},
  series       = {Materials Research Express},
  title        = {Spectroscopic investigations of arrays containing vertically and horizontally aligned silicon nanowires},
  url          = {http://dx.doi.org/10.1088/2053-1591/3/12/125021},
  doi          = {10.1088/2053-1591/3/12/125021},
  volume       = {3},
  year         = {2016},
}