US 12,150,376 B2
Organic light-emitting device and apparatus including the same
Seulong Kim, Yongin-si (KR); Kyungsik Kim, Yongin-si (KR); Sungwook Kim, Yongin-si (KR); Seungjin Chu, Yongin-si (KR); and Jaeweon Hur, Yongin-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Aug. 18, 2020, as Appl. No. 16/996,543.
Claims priority of application No. 10-2019-0113020 (KR), filed on Sep. 11, 2019.
Prior Publication US 2021/0074918 A1, Mar. 11, 2021
Int. Cl. H01L 51/00 (2006.01); H10K 85/30 (2023.01); H10K 85/60 (2023.01); H10K 50/11 (2023.01); H10K 50/16 (2023.01); H10K 59/123 (2023.01); H10K 101/10 (2023.01)
CPC H10K 85/633 (2023.02) [H10K 85/342 (2023.02); H10K 85/615 (2023.02); H10K 85/626 (2023.02); H10K 85/636 (2023.02); H10K 85/654 (2023.02); H10K 85/6572 (2023.02); H10K 85/6574 (2023.02); H10K 50/11 (2023.02); H10K 50/166 (2023.02); H10K 59/123 (2023.02); H10K 85/622 (2023.02); H10K 2101/10 (2023.02)] 9 Claims
 
1. An organic light-emitting device comprising:
a first electrode;
a second electrode facing the first electrode;
an organic layer between the first electrode and the second electrode and comprising an emission layer; and
an electron transport region between the emission layer and the second electrode,
wherein the electron transport region comprises a first auxiliary layer and a second auxiliary layer,
the first auxiliary layer is between the emission layer and the second auxiliary layer,
the first auxiliary layer comprises a first compound,
the second auxiliary layer comprises a second compound, and
the organic light-emitting device satisfies the equations: T1(EML)≥T1(AXL1)+0.3 eV, and T1(AXL2)≥T1(AXL1)+0.5 eV,
wherein T1(EML) is a triplet energy level (eV) of a compound comprised in the emission layer,
the compound comprised in the emission layer is selected from compounds BD and FD1 to FD22:

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T1(AXL1) is a lowest triplet excitation energy (eV) of the first compound,
T1(AXL2) is a lowest triplet excitation energy level (eV) of the second compound, and
T1(EML), T1(AXL1), and T1(AXL2) are calculated using a density functional theory (DFT) method, wherein the compound comprised in the emission layer, the first compound, and the second compound are structurally optimized at a level of B3LYP/6-31G* (d,p),
the first compound is selected from the following compounds:

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the second compound is selected from the following compounds:

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