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The Role of Nanotubes in Carbon Nanotube-Silicon Solar Cells

Tune, Daniel D. and Hennrich, Frank and Dehm, Simone and Klein, Michael F. G. and Glaser, Konstantin and Colsmann, Alexander and Shapter, Joseph G. and Lemmer, Uli and Kappes, Manfred M. and Krupke, Ralph and Flavel, Benjamin S. (2013):
The Role of Nanotubes in Carbon Nanotube-Silicon Solar Cells.
In: Advanced Energy Materials, Wiley-VCH Verlag GmbH & Co. KGaA, pp. 1091-1097, 3, (8), ISSN 16146832,
[Online-Edition: http://dx.doi.org/10.1002/aenm.201200949],
[Article]

Abstract

The mechanism of action of nanotube-silicon heterojunction solar cells is under discussion with literature reports suggesting either p-n or Schottky junction characteristics. The crux of the issue is whether the nanotubes contribute to the observed photocurrent or not. In order to further understand the mechanism of action of these solar cells, devices were fabricated using nanotubes sorted by (n,m) species, so that the excitonic transition is well defined and is outside the range of absorption of silicon and such that any contribution to the photocurrent from the nanotubes should be easily resolved from that of the silicon by analysis of the photocurrent spectrum. The devices exhibited the photocurrent spectra of silicon only, indicating that the nanotubes do not contribute to the photocurrent. However, by changing the back contact electrode material, results were obtained that appear to show such a contribution.

Item Type: Article
Erschienen: 2013
Creators: Tune, Daniel D. and Hennrich, Frank and Dehm, Simone and Klein, Michael F. G. and Glaser, Konstantin and Colsmann, Alexander and Shapter, Joseph G. and Lemmer, Uli and Kappes, Manfred M. and Krupke, Ralph and Flavel, Benjamin S.
Title: The Role of Nanotubes in Carbon Nanotube-Silicon Solar Cells
Language: English
Abstract:

The mechanism of action of nanotube-silicon heterojunction solar cells is under discussion with literature reports suggesting either p-n or Schottky junction characteristics. The crux of the issue is whether the nanotubes contribute to the observed photocurrent or not. In order to further understand the mechanism of action of these solar cells, devices were fabricated using nanotubes sorted by (n,m) species, so that the excitonic transition is well defined and is outside the range of absorption of silicon and such that any contribution to the photocurrent from the nanotubes should be easily resolved from that of the silicon by analysis of the photocurrent spectrum. The devices exhibited the photocurrent spectra of silicon only, indicating that the nanotubes do not contribute to the photocurrent. However, by changing the back contact electrode material, results were obtained that appear to show such a contribution.

Journal or Publication Title: Advanced Energy Materials
Volume: 3
Number: 8
Publisher: Wiley-VCH Verlag GmbH & Co. KGaA
Uncontrolled Keywords: carbon nanotubes, electronic structures/processes/mechanisms, photovoltaic devices, solar cells, thin films
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Molekulare Nanostrukturen
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 06 Jun 2014 11:31
Official URL: http://dx.doi.org/10.1002/aenm.201200949
Identification Number: doi:10.1002/aenm.201200949
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