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Oxidised carbon nanotubes as solution processable, high work function hole-extraction layers for organic solar cells
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Hatton, Ross A., Blanchard, N. P., Tan, Li Wei, Latini, Gianluca, Cacialli, Franco and Silva, S. Ravi P. (2009) Oxidised carbon nanotubes as solution processable, high work function hole-extraction layers for organic solar cells. Organic Electronics, Vol.10 (No.3). pp. 388-395. doi:10.1016/j.orgel.2008.12.013 ISSN 1566-1199.
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Official URL: http://dx.doi.org/10.1016/j.orgel.2008.12.013
Abstract
For efficient hole-extraction in solution processed organic solar cells the transparent indium-tin oxide (ITO) electrode is invariably pre-coated with a thin layer of the high work function conducting polymer poly(3,4-ethylenedioxythiophene) doped with poly(styrene-sulfonate). Herein we show that thin films of partially oxidised multi-wall and single-wall carbon nanotubes are equally effective at facilitating hole-extraction in efficient (similar to 2.7%) bulk-heterojunction organic solar cells based on poly(3-hexylthiophene) (P3HT): [6,6]-phenyl-C-61 butyric acid methyl ester (PCBM) blends. Crucially, in contrast to PEDOT:PSS, deposition is from aqueous solutions of low acidity (pH 6-7) ensuring compatibility with ITO and other emerging conducting oxides. Furthermore, thin oxidised carbon nanotube films offer greater transparency in the near-infrared as compared to PEDOT:PSS films of comparable thickness. The functionality of these nano-structured films is demonstrated in relatively large area devices (similar to 0.35 cm(2)) and the performance rationalised based on measurements of the electronic structure and morphology. (C) 2009 Elsevier B.V. All rights reserved.
Item Type: | Journal Article | ||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) Q Science > QC Physics |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
Journal or Publication Title: | Organic Electronics | ||||
Publisher: | Elsevier BV | ||||
ISSN: | 1566-1199 | ||||
Official Date: | May 2009 | ||||
Dates: |
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Volume: | Vol.10 | ||||
Number: | No.3 | ||||
Number of Pages: | 8 | ||||
Page Range: | pp. 388-395 | ||||
DOI: | 10.1016/j.orgel.2008.12.013 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Funder: | Royal Academy of Engineering, Engineering and Physical Sciences Research Council (EPSRC) |
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