RT Journal Article
T1 Iridium metal complexes containing N-heterocyclic carbene ligands for blue-light-emitting electrochemical cells
A1 Yang, Cheng-Han
A1 Beltrán Fínez, Juan Ignacio
A1 Lemaur, Vincent
A1 Cornil, Jérôme
A1 Hartmann, David
A1 Sarfert, Wiebke
A1 Fröhlich, Roland
A1 Bizzarri, Claudia
A1 De Cola, Luisa
AB A new series of cationic blue-emitting, heteroleptic iridium(III)-based metal complexes were systematically synthesized using two 4,6-difluorophenylpyridine ligands as well as one methyl- or n-butyl-substituted bisimidazolium salt carbene-type ligand. In degassed CH2Cl2, all complexes display highly efficient, blue phosphorescence (λmax ∼ 452 nm; emission quantum yield ∼ 0.30) at room temperature and also show blue emission in a thin film. The measured photophysical properties of the complexes have been rationalized with the help of quantum-chemical calculations. Because of the high solubility of the complexes, solution-processed devices, light-emitting electrochemical cells (LEECs), were made. The results showed that true blue emission and short turn-on time is achieved when an ionic conductor, tetrabutylammonium trifluoromethanesulfonate, was used as the matrix for the film containing the emitters. These iridium complexes and the described devices are the bluest materials ever reported and the first case of LEECs based on carbene ligands.
PB American Chemical Society
SN 0020-1669
YR 2010
FD 2010-10-08
LK https://hdl.handle.net/20.500.14352/93122
UL https://hdl.handle.net/20.500.14352/93122
LA eng
NO Yang, C. H., Beltran, J., Lemaur, V., Cornil, J., Hartmann, D., Sarfert, W., ... & De Cola, L. (2010). Iridium metal complexes containing N-heterocyclic carbene ligands for blue-light-emitting electrochemical cells. Inorganic chemistry, 49(21), 9891-9901.
NO Siemens AG
NO Corporate Technology
NO CT MM I
NO European Commssion
NO Alexander von Humboldt Foundation
NO Centre National de la Recherche Scientifique (France)
DS Docta Complutense
RD 4 abr 2025