Highly efficient white organic light-emitting diodes using hybrid-spacer or/and codoped blue emitting layers

The Authors have demonstrated highly efficient white organic light-emitting diodes using hybrid-spacer which was inserted between each emitting layer or/and codoped blue emitting layers with the different functional material. The characteristics of WOLEDs showed the maximum external quantum efficiency of 13.8%, power efficiency of 33.66 Im/W, and Commission Internationale de I'Eclairage coordinates of(x=0.36, y=0.37), respectively.