Abstract
AbstractBy doping a fluorescent dye as sensitizer in the emissive layer, we realized high efficient red organic light‐emitting diodes (OLEDs) based a europium complex. The OLEDs realized by this method showed pure red emission at 612 nm with a full width at half maximum of 3 nm. The maximum brightness and EL efficiency reached 2450 cd/m2 at 20 V and 9.0 cd/A (6.0 lm/w) at current density of 0.012 mA/cm2, respectively. At the brightness of 100 cd/m2, the current efficiency yet reached 4.4 cd/A.
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