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Understanding electron flow in conducting polymer films: injection, mobility, recombination and mesostructure

A M Stoneham1, M M D Ramos2, A M Almeida2, H M G Correia2, R M Ribeiro2, H Ness3 and A J Fisher1

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We survey the current state of models for electronic processes in conducting polymer devices, especially light-emitting diodes. We pay special attention to several processes that have been somewhat neglected in the previous literature: charge injection from electrodes into a polymer sample, mobility of charge-or energy-carrying defects within a single molecule and (more briefly) transfer of carriers between molecules and the interaction between the charge transport and the mesostructure of the polymer. Within all these areas substantial progress has been made in recent years in elucidating the important physics, but further progress is needed to make quantitative contact with experiment.


PACS

73.50.Gr Charge carriers: generation, recombination, lifetime, trapping, mean free paths

73.61.Ph Polymers; organic compounds

73.50.Dn Low-field transport and mobility; piezoresistance

85.60.Jb Light-emitting devices

Subjects

Soft matter, liquids and polymers

Electronics and devices

Surfaces, interfaces and thin films

Optics, quantum optics and lasers

Dates

Issue 42 (28 October 2002)

Received 12 August 2002

Published 11 October 2002



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