Patent ID: 9406908
Filing Date: 2016-08-02
CPC Classification: H01L

Claim Text:
1. An organic light emitting device comprising: an anode; a cathode; and a plurality of light emitting stacks on top of each other between the anode and the cathode, the plurality of light emitting stacks respectively emitting light of colors different from each another, wherein the plurality of light emitting stacks include a first stack including a light emitting layer emitting a first blue light and a second stack including a light emitting layer emitting a second blue light and a yellow-green to red light, wherein the first stack is closest to the anode, and the second stack is closest to the cathode, wherein, in the second stack, the light emitting layer emitting the second blue light and the yellow-green to red light includes a light emitting layer emitting the second blue light and a separate light emitting layer emitting the yellow-green to red light, and wherein the light emitting layer emitting the yellow-green to red light includes a first host material having yellow-green to red light emitting and electron transporting characteristics, a second host material having hole transporting characteristics, and a yellow-green to red dopant.