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Proceedings Paper

Carbon nanotube composites as efficient charge transport media in organic optoelectronic devices
Author(s): Patrick Fournet; Jonathan N. Coleman; Diarmuid F. O'Brien; Bernd Lahr; Anna Drury; Christopher R. McNeill; Paul C. Dastoor; Gordon G. Wallace; Hans-Heinrich Hoerhold; Werner J. Blau
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Paper Abstract

Thanks to their cheap processability, organic optoelectronic devices are believed to gradually gain a non-negligible place on the market. However, their performances remain low, mainly because of the poor electron transport in conventional polymers used in such devices. Carbon nanotubes, with a bulk conductivity as high as 10E5 S/m, could therefore be seen as potential candidates to address this important issue. In this work, we have studied the use of a carbon nanotube and polymer composite as an active layer in organic light-emitting diodes and organic photovoltaic devices. Enhanced brightness was achieved using the composite as an electron-transport layer in organic light-emitting diodes, the best efficiency being obtained for those devices with a nanotube content of 1.2 %. Secondly, we have studied the use of the polymer and carbon nanotube composite as the active layer in organic photovoltaic cells. Photocurrents in such devices were greater than that of the cells without carbon nanotubes. It is believed that carbon nanotube composites could act as efficient transport media for charges, which were originally dissociated. This study has demonstrated that carbon nanotubes can be used as functional materials in organic optoelectronic devices and enhance the charge transport, hence the efficiency in such devices.

Paper Details

Date Published: 27 August 2003
PDF: 12 pages
Proc. SPIE 4876, Opto-Ireland 2002: Optics and Photonics Technologies and Applications, (27 August 2003); doi: 10.1117/12.463921
Show Author Affiliations
Patrick Fournet, Trinity College Dublin (Ireland)
Jonathan N. Coleman, Trinity College Dublin (Ireland)
Diarmuid F. O'Brien, Allegro Technologies Ltd. (Ireland)
Bernd Lahr, Trinity College Dublin (Ireland)
Anna Drury, Trinity College Dublin (Ireland)
Christopher R. McNeill, Univ. of Newcastle (Australia)
Paul C. Dastoor, Univ. of Newcastle (Australia)
Gordon G. Wallace, Univ. of Wollongong (Australia)
Hans-Heinrich Hoerhold, Friedrich-Schiller-Univ. Jena (Germany)
Werner J. Blau, Trinity College Dublin (Ireland)

Published in SPIE Proceedings Vol. 4876:
Opto-Ireland 2002: Optics and Photonics Technologies and Applications
Vincent Toal; Norman Douglas McMillan; Gerard M. O'Connor; Eon O'Mongain; Austin F. Duke; John F. Donegan; James A. McLaughlin; Brian D. MacCraith; Werner J. Blau, Editor(s)

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