OLED device having improved contrast

An organic light-emitting diode (OLED) device comprising:

• a first electrode and a second transparent electrode having one or more organic layers formed there-between, at least one organic layer being light-emitting;
• a contrast enhancement element formed on a side of the second transparent electrode opposite the organic layers, wherein the contrast enhancement element comprises a patterned reflective layer for reflecting emitted light and a corresponding light-absorbing layer for absorbing ambient light, wherein the patterned reflective layer is located between the light-absorbing layer and the second transparent electrode and wherein the corresponding layers form one or more transparent openings through the reflective and light-absorbing layers so that light emitted by the light-emitting organic layer passes through the transparent openings;
• and
• a substrate or a cover through which light is emitted and a scattering layer, wherein the openings in the contrast enhancement element form a low-index element having a refractive index lower than the refractive index range of the organic layers and of the substrate or cover through which light is emitted, and wherein the low-index element is between the scattering layer and the substrate or cover through which light is emitted.