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Steady State Photoconductivity in Conjugated Polymers

Published online by Cambridge University Press:  21 March 2011

C. D. Sitch ,
D. P. Halliday  and
A. P. Monkman
C. D. Sitch
Affiliation:
Organic Electroactive Materials Research Group, Department of Physics, University of Durham, South Road, Durham. DH1 3LE., UK
D. P. Halliday
Affiliation:
Organic Electroactive Materials Research Group, Department of Physics, University of Durham, South Road, Durham. DH1 3LE., UK
A. P. Monkman
Affiliation:
Organic Electroactive Materials Research Group, Department of Physics, University of Durham, South Road, Durham. DH1 3LE., UK
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Abstract

Visible and ultraviolet photoconductivity (PC) measurements have been performed on thick (7[.proportional]m) and thin (170nm) films of poly[2-methoxy, 5 ethyl (2' hexyloxy) paraphenylenevinylene] (MEH-PPV) sandwiched between indium tin oxide (ITO) and semitransparent gold (Au) electrodes. PC spectra were obtained for samples under different bias polarities and for illumination through the ITO electrode and through the Au electrode. The results obtained indicate that the absorbed photons form excitons that dissociate extrinsically at or near the electrodes to form hole polarons or intrinsically at higher photon energies in the bulk polymer.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 665: Symposium C – Electronic, Optical and Optoelectronic Polymers and Oligomers , 2001 , C8.17
Copyright
Copyright © Materials Research Society 2001

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References

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