US 12,279,518 B2
Organic light-emitting device
Sun Woo Kang, Yongin-si (KR); Sang Ho Jeon, Yongin-si (KR); and Young Mi Cho, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Appl. No. 17/281,665
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
PCT Filed Jul. 24, 2019, PCT No. PCT/KR2019/009197
§ 371(c)(1), (2) Date Mar. 31, 2021,
PCT Pub. No. WO2020/096167, PCT Pub. Date May 14, 2020.
Claims priority of application No. 10-2018-0134433 (KR), filed on Nov. 5, 2018; and application No. 10-2019-0071766 (KR), filed on Jun. 17, 2019.
Prior Publication US 2022/0013737 A1, Jan. 13, 2022
Int. Cl. H10K 85/30 (2023.01); C09K 11/06 (2006.01); H10K 50/11 (2023.01); H10K 50/12 (2023.01); H10K 50/13 (2023.01); H10K 85/60 (2023.01); H10K 101/10 (2023.01); H10K 101/30 (2023.01); H10K 101/40 (2023.01); H10K 102/00 (2023.01)
CPC H10K 85/346 (2023.02) [C09K 11/06 (2013.01); H10K 85/342 (2023.02); H10K 85/626 (2023.02); H10K 85/654 (2023.02); H10K 85/6572 (2023.02); C09K 2211/1007 (2013.01); C09K 2211/1011 (2013.01); C09K 2211/1018 (2013.01); C09K 2211/104 (2013.01); C09K 2211/1044 (2013.01); C09K 2211/185 (2013.01); H10K 50/11 (2023.02); H10K 50/12 (2023.02); H10K 50/13 (2023.02); H10K 2101/10 (2023.02); H10K 2101/30 (2023.02); H10K 2101/40 (2023.02); H10K 2102/351 (2023.02)] 19 Claims
OG exemplary drawing
 
1. An organic light-emitting device comprising:
an anode;
a cathode facing the anode; and
an organic layer arranged between the anode and the cathode and comprising an emission layer and an auxiliary layer,
wherein the emission layer is in direct contact with the auxiliary layer,
the emission layer comprises a dopant,
the auxiliary layer comprises a first compound and a second compound, and
the dopant, the first compound, and the second compound satisfy Equations 1 to 3:
wherein the dopant emits light, and each of the first compound and the second compound does not emit light:
T1(D)>T1(C1)   Equation 1
S1(D)<S1(C1)   Equation 2
S1(C1)<S1(C2)   Equation 3
wherein, in Equations 1 to 3,
T1(D) is a lowest excited triplet energy level of the dopant,
T1(C1) is a lowest excited triplet energy level of the first compound,
S1(D) is a lowest excited singlet energy level of the dopant,
S1(C1) is a lowest excited singlet energy level of the first compound, and
S1(C2) is a lowest excited singlet energy level of the second compound.