Abstract
AbstractWe report highly efficient electron injection layer (EIL) of LiF/Yb bilayer for top‐emitting organic light emitting diodes. The device with the LIF/Yb bilayer shows reduced operating voltage and enhanced efficiencies compared to other two devices with Yb and LiF/Al due to the reduced electron injection barrier, resulting in better charge balance. The device with the LiF/Yb bilayer shows high luminous efficiency of 53.2 cd/A and external quantum efficiency of 16.9%.
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