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RESEARCH PRODUCT
Stable Green Electroluminescence from an Iridium Tris-Heteroleptic Ionic Complex
Khaja NazeeruddinJulien FreyManuel DelgadoHenk J. BolinkEtienne BaranoffEtienne BaranoffEnrique OrtíDaniel Torderasubject
TrisMaterials scienceGeneral Chemical EngineeringIonic bondingchemistry.chemical_elementGeneral ChemistryElectroluminescencePhotochemistryElectrochemical cellchemistry.chemical_compoundchemistryMaterials ChemistryLight-emitting electrochemical cellIridiumIonic complexVisible spectrumdescription
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–2), 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-05-02 | Chemistry of Materials |