High contrast flexible organic light emitting diodes under ambient light without sacrificing luminous efficiency

► The metal-dielectric multilayer as anti-reflection layer of top emission OLEDs. ► The anti-reflection structure designed to have an asymmetric reflectance. ► Low reflectance (6%) and high efficiency (1.75 times higher than circular polarizer). ► Flexible OLEDs with anti-reflection layer have extremely high durability.