Abstract
Two novel iridium(III) (Ir(III)) complexes (dmabt)2Ir(acac) and (dpabt)2Ir(acac)(dmabt, 4-N,N-dimethylbenzenamineyl-2-benzo[d]thiazole; dpabt, 4-N,N-diphenylbenzenamineyl-2-benzo[d]thiazole; acac, acetylacetone) were synthesized and structurally characterized by NMR and mass spectrometry. The organic light-emitting diodes based on these complexes with the structure of ITO/m-MTDATA (10nm)/NPB (20nm)/CBP: Ir-complex (X%, 30nm)/BCP (10nm)/Alq3 (30nm)/LiF (1nm)/Al (100nm) were fabricated. The device based on (dmabt)2Ir(acac) exhibited a maximum efficiency of 19.5cd/A, a luminance of 15802cd/cm2; and the device based on (dpabt)2Ir(acac) showed a maximum efficiency of 14.8cd/A, a luminance of 11334cd/cm2. Both devices displayed orange emissions and the corresponding Commission International de L’Eclairage (CIE) coordinates (1931) were (0.517, 0.481) and (0.557, 0.443), respectively.
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