Patent ID: 9368744
Filing Date: 2016-06-14
CPC Classification: H01L

Claim Text:
1. An organic light emitting diode device, comprising: a first electrode; a second electrode facing the first electrode; and a light emitting member disposed between the first electrode and the second electrode, the light emitting member including at least two light emitting units including a first light emitting unit and a second light emitting unit stacked on the first light emitting unit, the first and second light emitting units each displaying a different color, wherein the first light emitting unit includes a first hole injection layer, a second hole injection layer directly on the first hole injection layer, a first hole transport layer directly on the second hole injection layer, and a first emission layer, a difference between a HOMO energy level of the first hole injection layer and a LUMO energy level of the second hole injection layer being smaller than about 0.5 eV, wherein the second light emitting unit includes a third hole injection layer, a second hole transport layer, and an second emission layer, and the first hole injection layer includes a different material from the first hole transport layer.