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Solvent processed conductive polymer with single-walled carbon nanotube composites

Published online by Cambridge University Press:  30 October 2015

Zhe Jia ,
Hui Zhao ,
Ying Bai ,
Ting Zhang ,
Amanda S. Lupinacci ,
Andrew M. Minor  and
Gao Liu
Zhe Jia
Affiliation:
Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Hui Zhao
Affiliation:
Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Ying Bai
Affiliation:
Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA; and School of Chemical Engineering & Environment, Beijing Institute of Technology, Beijing 100081, China
Ting Zhang
Affiliation:
School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China
Amanda S. Lupinacci
Affiliation:
Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, California 94720, USA; and National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Andrew M. Minor
Affiliation:
Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, California 94720, USA; and National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Gao Liu*
Affiliation:
Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
*
a)Address all correspondence to this author. e-mail: gliu@lbl.gov
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Abstract

Single-walled carbon nanotube (SWNT) and conductive polymer composite were studied as a potential electrode candidate for plastic electronic devices such as organic light-emitting diodes (OLEDs) and solar cells. A novel conductive polymer, poly(2,7–9,9(di(oxy-2,5,8-trioxadecane))fluorene) (PFO), was synthesized and characterized as a surfactant to disperse SWNTs in solutions. The ethylene oxide (EO) side chain of rigid PFO backbone acts as a template to wrap around SWNTs in solution. Up to 0.02% (by weight) of SWNTs are stabilized and well separated in the solution phase. The carbon nanotube can be dispersed in solutions for over 4 mo. Transmission electron microscopy (TEM) images of solvent cast film suggest highly uniformed SWNT distribution incorporated in the conductive polymer matrix. Transmittance characterization shows the film is as transparent as indium tin oxide conducting glass. Conductivity measurement shows SWNTs can effectively inject charges into the PFO polymer matrix at low voltage. The current versus voltage profile of the SWNT/PFO composite film (2% SWNT in PFO by weight) shows that the majority current conducting is carried by SWNTs.

Keywords

polymer compositeconductive polymercarbon nanotubesolvent processOLED
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 22 , 27 November 2015 , pp. 3403 - 3411
Copyright
Copyright © Materials Research Society 2015 

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