Abstract
Using 2-(2,4-difluorophenyl)-4-(trifluoromethyl)pyrimidine as main ligand and tetraphenylimidodiphosphinate as ancillary ligand, one iridium complex was synthesized. This complex shows a green emission peaking at 543 nm with a quantum efficiency yield as 48% in deareated CH2Cl2 solution. It also has good thermal stability with a decomposition temperature of 351 °C. Using this material as emitter, the organic light-emitting diode shows good performances with a maximum luminance 42 898 cd/m2, a maximum current efficiency up to 54.29 cd/A with low efficiency roll-off. At the luminance of 5000 and 10 000 cd/m2, the current efficiencies are still kept at 46.70 and 40.63 cd/A, respectively.
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