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  4. Near-UV to red-emitting charged bis-cyclometallated iridium(III) complexes for light-emitting electrochemical cells
 
research article

Near-UV to red-emitting charged bis-cyclometallated iridium(III) complexes for light-emitting electrochemical cells

Kessler, Florian  
•
Costa, Ruben D.
•
Di Censo, Davide  
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2012
Dalton Transactions

Herein we report a series of charged iridium complexes emitting from near-UV to red using carbene-based (NC)-C-boolean AND: ancillary ligands. Synthesis, photophysical and electrochemical properties of this series are described in detail together with X-ray crystal structures. Density Functional Theory calculations show that the emission originates from the cyclometallated main ligand, in contrast to commonly designed charged complexes using bidentate (NN)-N-boolean AND ancillary ligands, where the emission originates from the ancillary (NN)-N-boolean AND ligand. The radiative process of this series of compounds is characterized by relatively low photoluminescence quantum yields in solution that is ascribed to non-radiative deactivation of the excited state by thermally accessible metal-centered states. Despite the poor photophysical properties of this series of complexes in solution, electroluminescent emission from the bluish-green to orange region of the visible spectrum is obtained when they are used as active compounds in light-emitting electrochemical cells.

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Type
research article
DOI
10.1039/c1dt10698h
Web of Science ID

WOS:000297705200023

Author(s)
Kessler, Florian  
Costa, Ruben D.
Di Censo, Davide  
Scopelliti, Rosario  
Orti, Enrique
Bolink, Henk J.
Meier, Sebastian
Sarfert, Wiebke
Graetzel, Michael  
Nazeeruddin, Md. Khaja  
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Date Issued

2012

Publisher

Royal Society of Chemistry

Published in
Dalton Transactions
Volume

41

Start page

180

End page

191

Subjects

Heterocyclic Carbene Ligands

•

Transition-Metal-Complexes

•

Functional Response Theory

•

Electroluminescent Devices

•

Temperature-Dependence

•

Excitation-Energies

•

Ir(Iii) Complexes

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Ancillary Ligand

•

Blue

•

State

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPI  
Available on Infoscience
January 5, 2012
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/76388
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