Patent ID: 9203034
Filing Date: 2015-12-01
Classification: H01L

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