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Electroluminescence and Photoluminescence of Fluorene-Carbazole Copolymer

Published online by Cambridge University Press:  10 February 2011

O. Stephan  and
J.C. Vial
O. Stephan
Affiliation:
Laboratoire de Spectrométrie Physique, Université Joseph Fourier Grenoble 1 and CNRS (UMR C5588), 140 rue de la physique, B.P. 87 38402 Saint Martin d'Hères Cedex, France
J.C. Vial
Affiliation:
Laboratoire de Spectrométrie Physique, Université Joseph Fourier Grenoble 1 and CNRS (UMR C5588), 140 rue de la physique, B.P. 87 38402 Saint Martin d'Hères Cedex, France
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Abstract

Thin layers of poly(dihexylfluorene-co-N-hexylcarbazole) sandwiched between ITO and aluminium electrodes show stable photoluminescence and electro-luminescence at room temperature and ambient atmosphere. I(V) and Electro-luminescence versus voltage curves present a much lower threshold than device made up of poly(dihexylfluorene) homopolymer. When using the copolymer, the barrier height for hole injection is reduced to a value close to 0.17 eV to be compared to 0.83 eV for the homopolymer. This difference in offsets has been confirmed by electrochemical investigations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 558: Symposium B – Flat-Panel Displays and Sensors-Principles, Materials… , 1999 , 299
Copyright
Copyright © Materials Research Society 2000

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References

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