Cyclometalated platinum() complexes with acyclic diaminocarbene ligands for OLED application

A novel series of cyclometalated platinum( ii ) complexes bearing acyclic diaminocarbene (ADC) ancillary ligands were designed and prepared. Their photophysical properties were systematically studied through experimental and theoretical investigations. All complexes exhibit green phosphorescence with a quantum efficiency of up to 45% in 2 wt% doped PMMA film at room temperature. The complexes are used as light-emitting dopants for organic light-emitting diode (OLED) fabrication. The devices displayed a green emission with a maximum current efficiency of 2.9 cd A −1 and a luminance of 2700 cd m −2 . These results show that these cyclometalated platinum( ii ) complexes can be used as efficient green emitting components of OLED devices. Cyclometallated platinum( ii ) species with ancillary acyclic diaminocarbene ligands work as efficient green emitting components of OLED devices.