Patent ID: 9299936
Filing Date: 2016-03-29
CPC Classification: C07D,H01L

Claim Text:
1. An organic light-emitting diode comprising: a first electrode; a second electrode facing the first electrode; an emission layer between the first electrode and the second electrode; a first mixed layer between the emission layer and the first electrode and comprising a first compound and a second compound; a second mixed layer between the emission layer and the first mixed layer and comprising a third compound and a fourth compound; a first charge generation layer between the first mixed layer and the first electrode and comprising the first compound, the second compound, and a first charge generation material; a second charge generation layer between the first mixed layer and the second mixed layer and comprising the third compound, the fourth compound, and a second charge generation material; and a buffer layer between the emission layer and the second mixed layer, wherein the first compound and the third compound are each independently a compound represented by Formula 1 below, and the second compound and the fourth compound are each independently a compound represented by Formula 2 below: wherein in Formula 1, Ar e and f are each independently an integer of 0 to 5; R R wherein in Formula 2, Ar a and b are each independently an integer of 0 to 5; c is an integer of 1 to 5; R d is an integer of 0 to 5; R R wherein the nitrogen atom-containing group is a 5-membered aromatic ring group comprising a nitrogen atom as a ring atom, a 6-membered aromatic ring group comprising a nitrogen atom as a ring atom, or a 9-membered aromatic ring group comprising a nitrogen atom as a ring atom and is formed by fusing a 5-membered aromatic group and a 6-membered aromatic group.