Light emitting device

Abstract

A light emitting device includes a substrate and a light emitting unit over the substrate. The light emitting unit includes a first electrode, an organic emissive layer over the first electrode, a first electron transportation layer over the organic emissive layer, and a metal-containing layer over the first transportation layer. An end of the first electron transportation layer meets the organic emissive layer and the metal-containing layer at a first meeting point, the organic emissive layer has an end which is close to the first meeting point meets the metal-containing layer at a second meeting point, the second meeting point is spaced apart from the first meeting point and away from the first electron transportation layer. Further, at least one of the first electron transportation layer and the metal-containing layer includes transitional metal or alkali metal.