US 12,120,954 B2
Organic light-emitting device and apparatus including the same
Hyojeong Kim, Yongin-si (KR); Minje Kim, Yongin-si (KR); Eungdo Kim, Yongin-si (KR); Hyunyoung Kim, Yongin-si (KR); Hyosup Shin, Yongin-si (KR); Seokgyu Yoon, Yongin-si (KR); Youngki Lee, Yongin-si (KR); Jungsub Lee, Yongin-si (KR); Jiyoung Lee, Yongin-si (KR); Hyejin Jung, Yongin-si (KR); Kunwook Cho, Yongin-si (KR); Hyeongu Cho, Yongin-si (KR); Minsoo Choi, Yongin-si (KR); Youngeun Choi, Yongin-si (KR); and Jaejin Lyu, Yongin-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Dec. 12, 2022, as Appl. No. 18/064,787.
Application 18/064,787 is a continuation of application No. 16/859,894, filed on Apr. 27, 2020, granted, now 11,527,725.
Claims priority of application No. 10-2019-0123356 (KR), filed on Oct. 4, 2019.
Prior Publication US 2023/0119261 A1, Apr. 20, 2023
Int. Cl. H01L 51/50 (2006.01); C09K 11/06 (2006.01); H10K 85/30 (2023.01); H10K 85/40 (2023.01); H10K 85/60 (2023.01); H10K 50/11 (2023.01); H10K 101/00 (2023.01); H10K 101/10 (2023.01); H10K 101/30 (2023.01)
CPC H10K 85/6572 (2023.02) [C09K 11/06 (2013.01); H10K 85/322 (2023.02); H10K 85/342 (2023.02); H10K 85/40 (2023.02); H10K 85/633 (2023.02); H10K 85/636 (2023.02); H10K 85/654 (2023.02); H10K 85/6574 (2023.02); C09K 2211/1077 (2013.01); C09K 2211/185 (2013.01); H10K 50/11 (2023.02); H10K 2101/00 (2023.02); H10K 2101/10 (2023.02); H10K 2101/30 (2023.02); H10K 2101/90 (2023.02)] 20 Claims
OG exemplary drawing
 
1. An organic light-emitting device comprising:
a first electrode,
a second electrode, and
an organic layer between the first electrode and the second electrode,
wherein the organic layer comprises an emission layer,
the organic layer comprises an electron transport region between the emission layer and the second electrode,
the electron transport region comprises a hole blocking layer,
the emission layer comprises a first compound, a second compound, a third compound, and a fourth compound,
the first compound, the second compound, the third compound, and the fourth compound are different from each other,
the third compound comprises a metal element having an atomic number of 40 or more,
the fourth compound comprises boron (B),
the hole blocking layer comprises a hole blocking material, and
each of the first compound, the second compound, and the hole blocking material satisfies Conditions 4 and 5:
T1(HB)≥T1(C1)  Condition 4
T1(HB)≥T1(C2)  Condition 5
wherein, in Conditions 4 and 5,
T1(C1) is a lowest excitation triplet energy level of the first compound;
T1(C2) is a lowest excitation triplet energy level of the second compound;
T1(HB) is a lowest excitation triplet energy level of the hole blocking material; and
each of T1(C1), T1(C2), and T1(HB) is an onset value which is a measured value.