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Mesoscopic study of the electronic properties of thin polymer films

Published online by Cambridge University Press:  11 February 2011

Ricardo M. Ribeiro ,
Marta M. D. Ramos ,
A. M. Almeida ,
Helena M. G. Correia ,
Jaime Silva A  and
M. Stoneham
Ricardo M. Ribeiro
Affiliation:
Departamento de Física, Universidade do Minho, Campus de Gualtar, 4710–057 Braga, Portugal
Marta M. D. Ramos
Affiliation:
Departamento de Física, Universidade do Minho, Campus de Gualtar, 4710–057 Braga, Portugal
A. M. Almeida
Affiliation:
Departamento de Física, Universidade do Minho, Campus de Gualtar, 4710–057 Braga, Portugal
Helena M. G. Correia
Affiliation:
Departamento de Física, Universidade do Minho, Campus de Gualtar, 4710–057 Braga, Portugal
Jaime Silva A
Affiliation:
Departamento de Física, Universidade do Minho, Campus de Gualtar, 4710–057 Braga, Portugal
M. Stoneham
Affiliation:
Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK
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Abstract

Conjugated polymers are very interesting for light emitting diodes. Further improvement in device performance requires a better understanding on the correlation between the polymer structure and device characteristics. A mesoscopic study using a generalised Monte Carlo method of bipolar charge transport in thin poly(p-phenylene-vinylene) (PPV) films is presented in this paper. We show that energy and spatial molecular disorder have a serious influence on migration of charge carriers within the polymer layer. The transfer of carriers between two polymer chains is made dependent on the chemical potential difference as well as on other features such as the distance between both molecules involved and the direction of the electric field. The purpose of the present work is to clarify the effects of local energy and polymer structural disorder on current flow, trapping and recombination on polymer based devices.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 744: Symposium M – Progress in Semiconductors II–Electronic and Optoelectronic Applications , 2002 , M8.36
Copyright
Copyright © Materials Research Society 2003

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References

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