White p-i-n organic light-emitting devices with high power efficiency and stable color

Abstract

Highly efficient p - i - n two-component white organic light-emitting devices have been fabricated with a thin dual emission layer system comprised of one codeposited emitting layer with blue and yellow dyes and one blue emitting layer, which gives rise to a balance white emission. The p - i - n white device achieved an electroluminescence efficiency of 10 cd ∕ A and a power efficiency of 9.3 lm ∕ W at 1000 cd ∕ m 2 and a low voltage of 3.4 V with a Commission Internationale de l’Eclairage coordinates of (0.32, 0.43). The electroluminescent color of this p - i - n white organic light-emitting diode device has been shown to be immune to drive current density variations.