Patent ID: 9515265
Filing Date: 2016-12-06
CPC Classification: C07C,C07D,C09B,H01L

Claim Text:
1. An organic light-emitting device, comprising: a first electrode; a second electrode facing the first electrode; an emission layer disposed between the first electrode and the second electrode; a first hole transport layer that is disposed between the emission layer and the first electrode and includes a first compound and a first charge-generation material; a second hole transport layer that is disposed between the emission layer and the first hole transport layer and includes a second compound; a third hole transport layer that is disposed between the emission layer and the second hole transport layer and includes a third compound and a second charge-generation material; and a fourth hole transport layer that is disposed between the emission layer and the third hole transport layer and includes a fourth compound; wherein the first compound, the second compound, the third compound, and the fourth compound are each independently a compound represented by Formula 1 or 2: wherein in Formulae 1 and 2, Z Ar a C a C R a C a C a C a C R a hydrogen, a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C a C a C a C —N(Q p and q are each independently an integer of 1 to 4.