Synthesis and characterization of new luminescent materials containing various substituted 8-quinolinolate

Abstract

Novel thermally stable aluminium and zinc complexes, Al(Clq)(3), Al(Brq)(3), Zn(Clq)(2), Zn(Brq)(2) and Zn(MeClq)(2) (Clq = 5,7-dichloro-8-quinolinolate, Brq = 5,7-dibromo-8-quinolinolate, MeClq = 5,7-dichloro-2-methyl-8-quinolinolate) were synthesized and characterized. The organic electroluminescent (EL) device ITO/TPD/emitting material/LiF/Al (ITO = indium-tin oxide, TPD = N,N'-diphenyl-N,N'-bis(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine) was employed to investigate their EL properties. In case of Al(Clq)(3), the EL device exhibits yellow light with maximum luminance of 375 cd/m(2) at 8V.