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Improved Stability of Solid State Light Emitting Electrochemical Cells Consisting of Ruthenium and Iridium Complexes

Published online by Cambridge University Press:  26 February 2011

Henk Jan Bolink ,
Luca Cappelli ,
Eugenio Coronado ,
Rubén D. Costa ,
Michael Graetzel ,
MdK Nazeeruddin ,
Pedro M Viruela  and
Enrique Ortí
Henk Jan Bolink
Affiliation:
henk.bolink@uv.es, Universidad de Valencia, Instituto de Ciencia Molecular, P.O. Box 22085, Valencia, E-46071, Spain
Luca Cappelli
Affiliation:
luca.cappelli@uv.es, Universidad de Valencia, Instituto de Ciencia Molecular, P.O. Box 22085, Valencia, E-46071, Spain
Eugenio Coronado
Affiliation:
eugenio.coronado@uv.es, Universidad de Valencia, Instituto de Ciencia Molecular, P.O. Box 22085, Valencia, E-46071, Spain
Rubén D. Costa
Affiliation:
rucosri@alumni.uv.es, Universidad de Valencia, Instituto de Ciencia Molecular, P.O. Box 22085, Valencia, E-46071, Spain
Michael Graetzel
Affiliation:
michael.graetzel@epfl.ch, Ecole Polytechnique Fédérale de Lausanne, Laboratory for Photonics and Interfaces, Lausanne, CH-1015, Switzerland
MdK Nazeeruddin
Affiliation:
mdKhaja.Nazeeruddin@epfl.ch, Ecole Polytechnique Fédérale de Lausanne, Laboratory for Photonics and Interfaces, Lausanne, CH-1015, Switzerland
Pedro M Viruela
Affiliation:
Pedro.M.Viruela@uv.es, Universidad de Valencia, Instituto de Ciencia Molecular, P.O. Box 22085, Valencia, E-46071, Spain
Enrique Ortí
Affiliation:
enrique.orti@uv.es, Universidad de Valencia, Instituto de Ciencia Molecular, P.O. Box 22085, Valencia, E-46071, Spain
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Abstract

Two charged organometallic complexes containing bulky hydrophobic ligands based on ruthenium (II) and iridium (III) were synthesized and their performance in solid state light emitting electrochemical cells is described. The complexes were chosen as due to their large ligands a diminished susceptibility towards the formation of destructive complexes during device operation is expected. The LEC device performances reveal the longest living devices reported so far under dc bias. Quantum chemical calculations confirm that the major effect of the bulky diphenylphenanthroline ligands is of steric origin and not related with changes in the molecular electronic structure of the complexes.

Keywords

organometallicoptoelectronicdisplay
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 965: Symposium S – Organic Electronics – Materials, Devices and Applications , 2006 , 0965-S03-04
Copyright
Copyright © Materials Research Society 2007

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References

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