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RESEARCH PRODUCT

Efficient orange light-emitting electrochemical cells

Daniel TorderaHenk J. BolinkRosario ScopellitiMohammad Khaja NazeeruddinNail M. ShavaleevAntonio PertegásMichael GrätzelEtienne BaranoffEnrique Ortí

subject

PhenanthrolineCationic polymerizationchemistry.chemical_elementQuantum yieldGeneral ChemistryOrange (colour)PhotochemistryElectrochemical cellchemistry.chemical_compoundchemistryMaterials ChemistryIridiumPhosphorescenceDichloromethane

description

We report the first bis-cyclometalated cationic iridium(III) complex with N-aryl-substituted 1H-imidazo [4,5-f][1,10]phenanthroline. The complex emits yellow-orange phosphorescence with a maximum at 583 nm, a quantum yield of 43%, and an excited-state lifetime of 910 ns in argon-saturated dichloromethane. Optimized orange light-emitting electrochemical cells with the new Ir(III) complex exhibit fast turn-on, a peak luminance of 684 cd m(-2) and a peak efficacy of 6.5 cd A(-1); in 850 h of continuous operation their luminance and efficacy decrease only by 20%.

yearjournalcountryeditionlanguage
2012-01-01Journal of Materials Chemistry
https://doi.org/10.1039/c2jm33969b