A highly efficient red-emitting phosphorescent polymer lighl-emilling diode (Ph-PLED) wilh a new iridi-um complex of bis(2-benzo [b] thiophen-2-yl-5-lrifluoromelhyl-pyridinalo-N, C3) iridium(III)(acelylacelonale) [( blimp) 2Ir( acao)] using poly (n-vinylcarbazole) (PVK) as hosl material was demonslraled. The PLED offers a maximum external quantum efficiency of 4. 5% with an emission peak of 648 ran. The CIE coordinates are ( 0. 71, 0. 29) and independent from driving current density, indicating an efficient reduction of self-quenching effect at high doping concentrations.
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