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Probing the Diameter Limit of Single Walled Carbon Nanotubes in SWCNT: Fullerene Solar Cells

Pfohl, Moritz and Glaser, Konstantin and Graf, Arko and Mertens, Adrian and Tune, Daniel D. and Puerckhauer, Tanja and Alam, Asiful and Wei, Li and Chen, Yuan and Zaumseil, Jana and Colsmann, Alexander and Krupke, Ralph and Flavel, Benjamin S. (2016):
Probing the Diameter Limit of Single Walled Carbon Nanotubes in SWCNT: Fullerene Solar Cells.
In: Advanced Energy Materials, pp. 1600890(1, 6, (21), ISSN 1614-6832,
[Online-Edition: http://dx.doi.org/10.1002/aenm.201600890],
[Article]

Abstract

In this work, for the first time, the diameter limit of surfactant wrapped single walled carbon nanotubes (SWCNTs) in SWCNT:C_60 solar cells is determined through preparation of monochiral small and large diameter nanotube devices as well as those from polychiral mixtures. Through assignment of the different nanotube chiralities by photoluminescence and optical density measurements a diameter limit yielding 0% internal quantum efficiency (IQE) is determined. This work provides insights into the required net driving energy for SWCNT exciton dissociation onto C_60 and establishes a family of (n,m) species which can efficiently be utilized in polymer-free SWCNT:C_60 solar cells. Using this approach the largest diameter nanotube with an IQE > 0% is found to be (8,6) with a diameter of 0.95 nm. Possible strategies to extend this diameter limit are then discussed.

Item Type: Article
Erschienen: 2016
Creators: Pfohl, Moritz and Glaser, Konstantin and Graf, Arko and Mertens, Adrian and Tune, Daniel D. and Puerckhauer, Tanja and Alam, Asiful and Wei, Li and Chen, Yuan and Zaumseil, Jana and Colsmann, Alexander and Krupke, Ralph and Flavel, Benjamin S.
Title: Probing the Diameter Limit of Single Walled Carbon Nanotubes in SWCNT: Fullerene Solar Cells
Language: English
Abstract:

In this work, for the first time, the diameter limit of surfactant wrapped single walled carbon nanotubes (SWCNTs) in SWCNT:C_60 solar cells is determined through preparation of monochiral small and large diameter nanotube devices as well as those from polychiral mixtures. Through assignment of the different nanotube chiralities by photoluminescence and optical density measurements a diameter limit yielding 0% internal quantum efficiency (IQE) is determined. This work provides insights into the required net driving energy for SWCNT exciton dissociation onto C_60 and establishes a family of (n,m) species which can efficiently be utilized in polymer-free SWCNT:C_60 solar cells. Using this approach the largest diameter nanotube with an IQE > 0% is found to be (8,6) with a diameter of 0.95 nm. Possible strategies to extend this diameter limit are then discussed.

Journal or Publication Title: Advanced Energy Materials
Volume: 6
Number: 21
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: 20 Dec 2016 11:46
Official URL: http://dx.doi.org/10.1002/aenm.201600890
Identification Number: doi:10.1002/aenm.201600890
Funders: B.S.F. gratefully acknowledges support from the Deutsche Forschungsgemeinschaft (DFG) under grant numbers FL 834/1-1 and FL 834/2-1. R.K. acknowledges funding by the DFG under INST 163/354-1 FUGG. K.G., A.M., T.P., and A.C. acknowledge funding by the, German Federal Ministry for Education and Research (BMBF) under contract 03EK3504 (project TAURUS) and support by the DFG Centre for Functional Nanostructures (CFN). A.G. and J.Z. acknowledge financial support by European Research Council under, the European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement No. 306298. Y.C. acknowledges support from the Faculty of Engineering and Information Technologies, The University of Sydney, under the Faculty Research Cluster, Program. R.K., B.S.F., Y.C., and W.L. acknowledge support from the Singaporean–German Researcher Mobility Scheme. The views expressed herein are those of the authors and are not necessarily those of the Faculty.
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