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Solvent Processible Composite Carbon Nanotube Cathode for Polymer LED Applications

Published online by Cambridge University Press:  01 February 2011

Gao Liu ,
Steve Johnson  and
John B. Kerr
Gao Liu
Affiliation:
Environmental Energy Technology Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720, U.S.A.
Steve Johnson
Affiliation:
Environmental Energy Technology Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720, U.S.A.
John B. Kerr
Affiliation:
Environmental Energy Technology Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720, U.S.A.
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Abstract

Composites of single wall carbon nanotubes (SWNT) and conductive polymers were studied as potential cathode materials for application in polymer light emitting devices. A new conductive poly(2,7–9,9 (di(oxy-2,5,8-trioxadecane))fluorene) (PFO) possessing surfactant properties was used to stabilize SWNTs in solutions. The rigid PFO backbones act as a template while the ethyleneoxide side chains appear to wrap around the SWNTs. Up to 0.02% (by weight) of SWNTs are stabilized in the solution phase. The current vs. voltage behavior of the SWNT/PFO composite film (2% SWNT in PFO by weight) shows that most of the current is carried by SWNTs.

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References

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