US 12,464,947 B2
White organic light-emitting device and display device using the same
Yu Jeong Lee, Seoul (KR); and Wook Song, Seoul (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Dec. 9, 2021, as Appl. No. 17/546,396.
Claims priority of application No. 10-2020-0190047 (KR), filed on Dec. 31, 2020.
Prior Publication US 2022/0209138 A1, Jun. 30, 2022
Int. Cl. H10K 50/11 (2023.01); H10K 50/12 (2023.01); H10K 85/60 (2023.01); H10K 101/10 (2023.01); H10K 101/30 (2023.01); H10K 101/40 (2023.01)
CPC H10K 85/6574 (2023.02) [H10K 85/622 (2023.02); H10K 85/624 (2023.02); H10K 85/6576 (2023.02); H10K 50/11 (2023.02); H10K 50/121 (2023.02); H10K 2101/10 (2023.02); H10K 2101/30 (2023.02); H10K 2101/40 (2023.02)] 18 Claims
OG exemplary drawing
 
1. A white organic light-emitting device, comprising:
a first electrode;
a second electrode, the second electrode and the first electrode facing each other;
a blue light-emitting stack;
a phosphorescent light-emitting stack comprising
a hole transport layer;
a red light-emitting layer on the hole transport layer;
a green light-emitting layer on the red light-emitting layer, the green light-emitting layer comprising
a hole-transporting host;
an electron-transporting host;
a first dopant having a green emission peak; and
a non-emissive second dopant; and
an electron transport layer on the green light-emitting layer;
wherein the blue light-emitting stack and the phosphorescent light-emitting stack are between the first electrode and the second electrode; and
a charge generation layer between the blue light-emitting stack and the phosphorescent light-emitting stack,
wherein a highest occupied molecular orbital, HOMO, energy level of the second dopant is lower than a HOMO energy level of the electron-transporting host, and
wherein a lowest unoccupied molecular orbital, LUMO, energy level of the second dopant is higher than a LUMO energy level of the first dopant.