US 11,856,839 B2
Light-emitting device and apparatus including the same
Dongchan Kim, Yongin-si (KR); Jiyoung Moon, Yongin-si (KR); Jihwan Yoon, Yongin-si (KR); Donghui Lee, Yongin-si (KR); Jihye Lee, Yongin-si (KR); Chulsoon Lee, Yongin-si (KR); Hakchoong Lee, Yongin-si (KR); Haemyeong Lee, Yongin-si (KR); Yoonhyeung Cho, Yongin-si (KR); and Wonsuk Han, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Sep. 30, 2020, as Appl. No. 17/038,768.
Claims priority of application No. 10-2020-0023838 (KR), filed on Feb. 26, 2020.
Prior Publication US 2021/0273181 A1, Sep. 2, 2021
Int. Cl. H10K 50/10 (2023.01); H10K 85/30 (2023.01); C09K 11/06 (2006.01); H10K 50/11 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 50/17 (2023.01); H10K 50/18 (2023.01)
CPC H10K 85/342 (2023.02) [C09K 11/06 (2013.01); H10K 85/346 (2023.02); C09K 2211/185 (2013.01); H10K 50/11 (2023.02); H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 50/17 (2023.02); H10K 50/171 (2023.02); H10K 50/18 (2023.02)] 15 Claims
OG exemplary drawing
 
1. A light-emitting device comprising:
a first electrode;
a second electrode; and
an interlayer located between the first electrode and the second electrode, wherein
the first electrode is an anode,
the second electrode is a cathode,
the interlayer comprises:
an emission layer; and
a hole transport region located between the first electrode and the emission layer, the emission layer comprises:
a first material including an inorganic semiconductor compound, an inorganic insulator compound, or any combination thereof;
a second material including a lanthanide metal; and
a third material that comprises an organic fluorescent dopant compound, an organometallic phosphorescent dopant compound, an organic delayed fluorescence dopant compound, or any combination thereof,
the hole transport region comprises a hole injection layer,
the hole injection layer comprises:
a fourth material; and
a fifth material,
the fourth material and the fifth material are different from each other,
the fourth material comprises a lanthanide metal halide, transition metal halide, a post-transition metal halide, a tellurium, a lanthanide metal telluride, transition metal telluride, a post-transition metal telluride, a lanthanide metal selenide, a transition metal selenide, a post-transition metal selenide, or any combination thereof, and
wherein for the fifth material;
the fifth material comprises a hole transport organic compound, and a volume ratio of the fourth material to the fifth material is in a range of about 1:99 to about 20:80; or
the fifth material comprises a post-transition metal halide, an alkali metal halide, an alkaline earth metal halide, a lanthanum metal halide, or any combination thereof, and the volume ratio of the fourth material to the fifth material is in a range of about 0:100 to about 50:50.