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Does electronic type matter when single-walled carbon nanotubes are used for electrode applications?
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Dabera, Dinesha, Prabhath, M. R. Ranga, Lai, Khue T., Jayawardena, K. D. G. Imalka, Sam, F. Laurent M., Rozanski, Lynn J., Adikaari, A. A. Damitha T. and Silva, S. Ravi P. (2015) Does electronic type matter when single-walled carbon nanotubes are used for electrode applications? Advanced Functional Materials, 25 (28). pp. 4520-4530. doi:10.1002/adfm.201501394 ISSN 1616-301X.
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Official URL: http://dx.doi.org/10.1002/adfm.201501394
Abstract
Single‐walled carbon nanotube (SWNT) electrodes that are chemically and mechanically robust are fabricated using a simple drop cast method with thermal annealing and acid treatment. An electronic‐type selective decrease in sheet resistance of SWNT electrodes with HNO3 treatment is shown. Semiconducting SWNTs show a significantly higher affinity toward hole doping in comparison to metallic SWNTs; a ≈12‐fold and a ≈fivefold drop in sheet resistance, respectively. The results suggest the insignificance of the electronic type of the SWNTs for the film conductivity after hole doping. The SWNT films have been employed as transparent hole extracting electrodes in bulk heterojunction (BHJ) organic photovoltaics. Performances of the devices enlighten the fact that the electrode film morphology dominates over the electronic type of the doped SWNTs with similar sheet resistance and optical transmission. The power conversion efficiency (PCE) of 4.4% for the best performing device is the best carbon nanotube transparent electrode incorporated large area BHJ solar cell reported to date. This PCE is 90% in terms of PCEs achieved using indium tin oxide (ITO) based reference devices with identical film fabrication parameters indicating the potential of the SWNT electrodes as an ITO replacement toward realization of all carbon solar cells.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||
Journal or Publication Title: | Advanced Functional Materials | ||||||||
Publisher: | Wiley - V C H Verlag | ||||||||
ISSN: | 1616-301X | ||||||||
Official Date: | 22 July 2015 | ||||||||
Dates: |
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Volume: | 25 | ||||||||
Number: | 28 | ||||||||
Page Range: | pp. 4520-4530 | ||||||||
DOI: | 10.1002/adfm.201501394 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access |
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