Organic light emitting diode device

An organic light emitting device is disclosed. An organic light emitting device according to one embodiment of the present invention comprises a reflection layer; an anode disposed on the reflection layer; a first stack disposed on the anode and comprising a first light emission layer; a charge generation layer disposed on the first stack; a second stack disposed on the charge generation layer and comprising a second light emission layer; and a cathode disposed on the second stack, the first light emission layer being disposed within about 120 to about 180 nm from a surface of the reflection layer and the second light emission layer being disposed within about 320 to about 380 nm from the surface of the reflection layer.