US 12,035,550 B2
Organic light-emitting device and electronic apparatus including the same
Heejoo Ko, Yongin-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Jan. 19, 2023, as Appl. No. 18/099,244.
Application 18/099,244 is a continuation of application No. 16/788,628, filed on Feb. 12, 2020, granted, now 11,600,795.
Claims priority of application No. 10-2019-0017966 (KR), filed on Feb. 15, 2019.
Prior Publication US 2023/0157046 A1, May 18, 2023
Int. Cl. H01L 51/50 (2006.01); H10K 50/11 (2023.01); H10K 50/13 (2023.01); H10K 85/30 (2023.01); H10K 85/40 (2023.01); H10K 85/60 (2023.01); H10K 101/10 (2023.01)
CPC H10K 50/13 (2023.02) [H10K 50/11 (2023.02); H10K 85/324 (2023.02); H10K 85/381 (2023.02); H10K 85/40 (2023.02); H10K 85/622 (2023.02); H10K 85/626 (2023.02); H10K 85/631 (2023.02); H10K 85/654 (2023.02); H10K 85/6565 (2023.02); H10K 85/6572 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02); H10K 2101/10 (2023.02)] 17 Claims
OG exemplary drawing
 
1. An organic light-emitting device comprising:
an anode;
a cathode; and
an organic layer between the anode and the cathode and comprising an emission region,
wherein:
the emission region comprises a first emission layer, a second emission layer, and a first layer;
the first emission layer comprises a first host and a first dopant;
the second emission layer comprises a second host and a second dopant;
the first layer is disposed between the first emission layer and the second emission layer and comprises a first material; and
the first host, the first dopant, the second host, the second dopant, and the first material satisfy Equations 1-1 to 1-4:
T1(Q1)≤T1(H1)  <Equation 1-1>
T1(Q1)≤T1(D1)  <Equation 1-2>
T1(Q1)≤T1(H2)  <Equation 1-3>
T1(Q1)≤T1(D2)  <Equation 1-4>,
wherein, in Equations 1-1 to 1-4,
T1(Q1) is a lowest excitation triplet energy level of the first material,
T1(H1) is a lowest excitation triplet energy level of the first host,
T1(D1) is a lowest excitation triplet energy level of the first dopant,
T1(H2) is a lowest excitation triplet energy level of the second host, and
T1(D2) is a lowest excitation triplet energy level of the second dopant.