Article Title

Semiconducting carbon nanotube/fullerene blended heterojunctions for photovoltaic near-infrared photon harvesting

Authors

Dominick J. Bindl, 1509 University Ave., Materials Science and Engineering Dept., University of Wisconsin–Madison, Madison WI 53706, USA
Adam S. Brewer, 1509 University Ave., Materials Science and Engineering Dept., University of Wisconsin–Madison, Madison WI 53706, USA
Michael S. Arnold, 1509 University Ave., Materials Science and Engineering Dept., University of Wisconsin–Madison, Madison WI 53706, USA

Keywords

Carbon nanotube, bulk heterojunction, photovoltaic, photodetector, NIR

Abstract

ABSTRACT We demonstrate that the near-infrared (NIR) absorptivity of semiconducting single-walled carbon nanotubes (s-SWCNTs) can be harnessed in blended heterojunctions with the fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). Photogenerated charge separation is efficiently driven by the ultrahigh interfacial area of the blends and the favorable energy offsets between the two materials. NIR-sensitive photovoltaic and photodetector devices utilizing the stack (indium tin oxide/ca. 10 nm s-SWCNT:PCBM/100 nm C60/10 nm 2,9- dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP)/Ag) were fabricated with NIR power conversion efficiencies >1.3% and peak, zero bias external quantum efficiency of 18% at λ = 1205 nm.

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-011-0167-0

Publisher

Tsinghua University Press

Recommended Citation

Dominick J. Bindl,Adam S. Brewer,Michael S. Arnold, Semiconducting carbon nanotube/fullerene blended heterojunctions for photovoltaic near-infrared photon harvesting. NanoRes.2011, 4(11): 1174-1179