Patent ID: 8410688

Claim:
A light-emitting device comprising: a first electrode; a second electrode; a first light-emitting unit and a second light-emitting unit formed between the first electrode and the second electrode; and a charge generation layer formed between the first light-emitting unit and the second light-emitting unit, wherein the first light-emitting unit comprises: a first light-emitting layer formed between the first electrode and the charge generation layer; and a first layer for controlling a movement of carriers formed between the first light-emitting layer and the charge generation layer, wherein the second light-emitting unit comprises: a second light-emitting layer formed between the charge generation layer and the second electrode; a second layer for controlling a movement of carriers formed between the second light-emitting layer and the second electrode, wherein each of the first and the second layers for controlling the movement of carriers contains a first organic compound and a second organic compound; wherein the first organic compound has an electron transporting property; wherein the second organic compound has an electron trapping property; wherein a weight percent of the first organic compound is higher than a weight percent of the second organic compound in each of the first and the second layers for controlling the movement of carriers; and wherein each of the first and the second light-emitting layers emits light when a voltage is applied such that a potential of the first electrode is higher than a potential of the second electrode.