Patent ID: 9444066
Filing Date: 2016-09-13
CPC Classification: H01L

Claim Text:
1. An organic electroluminescent device comprising: first and second electrodes facing each other on a substrate; and at least first, second, and third light emitting units sequentially stacked on the first electrode, wherein the first light emitting unit comprises a first blue emission layer, the second light emitting unit comprises a yellow-green emission layer, and the third light emitting unit comprises a second blue emission layer, wherein the first blue emission layer close to the first electrode comprises a first blue dopant having a different maximum luminescence wavelength than that of a second blue dopant of the second blue emission layer close to the second electrode, and wherein a distance between the first blue emission layer and the yellow-green emission layer is less than a distance between the second blue emission layer and the yellow-green emission layer.