Patent ID: 9525138
Filing Date: 2016-12-20
CPC Classification: H01L

Claim Text:
1. An organic light-emitting diode comprising: a substrate; a first electrode on the substrate; a second electrode opposite to the first electrode; an emission layer between the first electrode and the second electrode; and an electron transport layer between the emission layer and the second electrode, wherein the electron transport layer comprises a stack structure including n number of electron transport units (where n is an integer of 1 or greater) each including a stack of a first layer, a first mixed layer, a second layer, a second mixed layer, and a third layer that are sequentially stacked upon one another, the first mixed layer and the second mixed layer each comprise an electron-transporting organic material and an electron migration-facilitating material, and the first layer comprises a first electron migration-facilitating material and excludes the electron-transporting organic material, the second layer comprises a second electron migration-facilitating material and excludes the electron-transporting organic material, and the third layer comprises a third electron migration-facilitating material and excludes the electron-transporting organic material.