Stable green electroluminescence from an iridium tris-heteroleptic ionic complex

D. Tordera, M. Delgado, E. Ortí, H.J. Bolink, J. Frey, M.K. Nazeeruddin, E. Baranoff

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82 Citations (Scopus)


An ionic tris-heteroleptic iridium complex gives green light-emitting electrochemical cells (LECs) with unprecedented performances for this part of the visible spectrum. The devices are very bright (>1000 cd m ), efficient (∼3%), and stable (>55 h). The novel complex is prepared using a new and efficient synthetic procedure. We show that there is a mixed orbital formation originating from the two different orthometalating ligands resulting in photophysical properties that lie between those of its two bis-heteroleptic analogs. Therefore, tris-heteroleptic complexes provide new avenues for fine-tunning the emission properties and to bridge gaps between a series of bis-heteroleptic complexes.
Original languageEnglish
Pages (from-to)1896-1903
Number of pages8
JournalChemistry of Materials
Issue number10
Publication statusPublished - 22 May 2012

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Copyright 2012 Elsevier B.V., All rights reserved.


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