TY - GEN
T1 - Stable and efficient light-emitting electrochemical cells
AU - Costa, Rubén D.
AU - Pertegás, Antonio
AU - Tordera, Daniel
AU - Lenes, Martijn
AU - Ortí, Enrique
AU - Bolink, Henk J.
AU - Graber, Stefan
AU - Constable, Edwin
AU - Housecroft, Catherine E.
PY - 2010
Y1 - 2010
N2 - Three new heteroleptic iridium complexes that combine two approaches, one leading to a high stability and the other yielding a high luminescence efficiency, are presented. All complexes contain a phenyl group at the 6-position of the neutral bpy ligand, which holds an additional, increasingly bulky substituent on the 4-position. The phenyl group allows for intramolecular π-π stacking, which renders the complex more stable and yields long-living light-emitting electrochemical cells (LECs). The additional substituent increases the intersite distance between the cations in the film, reducing the quenching of the excitons, and should improve the efficiency of the LECs. Indeed, LEC devices employing these complexes as the primary active component show shorter turn-on times, higher efficiencies and luminances, and, surprisingly, also demonstrate longer device stabilities.
AB - Three new heteroleptic iridium complexes that combine two approaches, one leading to a high stability and the other yielding a high luminescence efficiency, are presented. All complexes contain a phenyl group at the 6-position of the neutral bpy ligand, which holds an additional, increasingly bulky substituent on the 4-position. The phenyl group allows for intramolecular π-π stacking, which renders the complex more stable and yields long-living light-emitting electrochemical cells (LECs). The additional substituent increases the intersite distance between the cations in the film, reducing the quenching of the excitons, and should improve the efficiency of the LECs. Indeed, LEC devices employing these complexes as the primary active component show shorter turn-on times, higher efficiencies and luminances, and, surprisingly, also demonstrate longer device stabilities.
KW - Bulky substituents
KW - High efficiency
KW - Ionic transition-metal complexes
KW - Iridium complexes
KW - Light-emitting electrochemical cells
UR - http://www.scopus.com/inward/record.url?scp=78049432888&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:78049432888
SN - 9781439834022
T3 - Nanotechnology 2010: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010
SP - 49
EP - 52
BT - Nanotechnology 2010
T2 - Nanotechnology 2010: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational - 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010
Y2 - 21 June 2010 through 24 June 2010
ER -