US 12,225,816 B2
Light-emitting device and electronic apparatus including the same
Hyunyoung Kim, Yongin-si (KR); Minje Kim, Yongin-si (KR); Hyojeong Kim, Yongin-si (KR); Jungsub Lee, Yongin-si (KR); and Jiyoung Lee, Yongin-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Sep. 1, 2021, as Appl. No. 17/446,647.
Claims priority of application No. 10-2020-0111681 (KR), filed on Sep. 2, 2020; and application No. 10-2021-0008316 (KR), filed on Jan. 20, 2021.
Prior Publication US 2022/0069235 A1, Mar. 3, 2022
Int. Cl. H01L 51/00 (2006.01); H10K 85/30 (2023.01); H10K 85/40 (2023.01); H10K 85/60 (2023.01); H10K 50/11 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 101/00 (2023.01); H10K 101/10 (2023.01); H10K 101/40 (2023.01)
CPC H10K 85/6572 (2023.02) [H10K 85/342 (2023.02); H10K 85/346 (2023.02); H10K 85/40 (2023.02); H10K 85/636 (2023.02); H10K 85/654 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02); H10K 50/11 (2023.02); H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 2101/10 (2023.02); H10K 2101/27 (2023.02); H10K 2101/40 (2023.02)] 20 Claims
 
1. A light-emitting device comprising:
a first electrode;
a second electrode; and
an interlayer between the first electrode and the second electrode and comprising an emission layer, wherein
the interlayer further comprises a hole transport region between the first electrode and the emission layer,
the hole transport region comprises a first auxiliary layer and a second auxiliary layer between the first electrode and the first auxiliary layer,
the first auxiliary layer comprises a first compound,
the second auxiliary layer comprises a second compound,
the first compound and the second compound are different from each other, and
a lowest excitation triplet energy level (T1) of the first compound is equal to or greater than about 1.60 eV and less than or equal to about 1.80 eV.