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High-Conductivity Solution-Processed Carbon Nanotube Networks as Transparent Electrodes in Organic Solar Cells

Published online by Cambridge University Press:  20 June 2013

Aminy E. Ostfeld
Affiliation:
Dept. of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA 94720, U.S.A.
Siân Fogden
Affiliation:
Linde Nanomaterials, Linde LLC, 1970 Diamond Street, San Marcos, CA 92078, U.S.A.
Amélie Catheline
Affiliation:
Dept. of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA 94720, U.S.A. Linde Nanomaterials, Linde LLC, 1970 Diamond Street, San Marcos, CA 92078, U.S.A.
Kee-Chan Kim
Affiliation:
Linde Nanomaterials, Linde LLC, 1970 Diamond Street, San Marcos, CA 92078, U.S.A.
Kathleen Ligsay
Affiliation:
Linde Nanomaterials, Linde LLC, 1970 Diamond Street, San Marcos, CA 92078, U.S.A.
Graham A. McFarlane
Affiliation:
Linde Nanomaterials, Linde LLC, 1970 Diamond Street, San Marcos, CA 92078, U.S.A.
Ana Claudia Arias
Affiliation:
Dept. of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA 94720, U.S.A.
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Abstract

Solutions of individual, unbroken single-walled carbon nanotubes in organic solvent were fabricated in a reductive dissolution process. Transparent conductive films deposited from these organic inks gave a significantly higher conductivity to absorptivity ratio than those cast from an aqueous dispersion of carbon nanotubes. For example, films from the organic ink have achieved a sheet resistance of 250 Ω/□ with transmittance of 92% at 550 nm wavelength, compared to 76% transmittance for a 250 Ω/□ film from the aqueous dispersion. The promise of these films as transparent electrodes has been demonstrated by their incorporation into organic solar cells with power conversion efficiency of 2.3%, comparable to that of solar cells produced using indium tin oxide transparent electrodes.

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Copyright
Copyright © Materials Research Society 2013 

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