Oled, method for manufacturing the same, display substrate and display device

Abstract

Embodiments of the present disclosure provide an OLED, a method for manufacturing the same, a display substrate and a display device. The OLED includes: a reflective electrode, an organic light-emitting layer, a translucent electrode, and a light extraction layer located on a side of the translucent electrode away from the organic light-emitting layer and being in contact with the translucent electrode, which are arranged in sequence, wherein the light extraction layer is of a single layer structure and has a refractive index that decreases along a light-emitting direction, the light-emitting direction is a direction of the light extraction layer away from the organic light-emitting layer, and wherein a refractive index of the light extraction layer on a side in contact with the translucent electrode is greater than the refractive index of the translucent electrode.

Dependencies are inferred from the claim text.