White organic light emitting device

摘要

A white organic light emitting device includes: first and second electrodes formed to face each other on a substrate; a first stack configured with a hole injection layer, a first hole transportation layer, a first light emission layer and a first electron transportation layer which are stacked between the first and second electrodes; a second stack configured with a second hole transportation layer, a second light emission layer, a third light emission layer, a second electron transportation layer and an electron injection layer which are stacked between the first stack and the second electrode; and a charge generation layer interposed between the first and second stacks and configured to adjust a charge balance between the two stacks.

主权项

1. A white organic light emitting device comprising:
first and second electrodes formed to face each other on a substrate; a first stack configured with a hole injection layer, a first hole transportation layer, a first light emission layer and a first electron transportation layer which are sequentially stacked between the first and second electrodes; a second stack configured with a second hole transportation layer, a second light emission layer, a third light emission layer, a second electron transportation layer and an electron injection layer which are sequentially stacked between the first stack and the second electrode; and a charge generation layer interposed between the first and second stacks and configured to adjust a charge balance between the first and second stacks, wherein the first light emission layer of the first stack is a blue fluorescent light emission layer with a single-peaked luminous property, the second and third light emission layers of the second stack have a two-peaked luminous property and come in contact with each other, one of the second and third light emission layers is one of green and yellow-green phosphorescent light emission layers, and the other one of the second and third light emission layers is a red phosphorescent light emission layer, and wherein the one of green and yellow-green phosphorescent light emission layers is thicker than the red phosphorescent light emission layer.