US 12,219,871 B2
Light emitting device
Keigo Hoshi, Yokohama (JP); Tetsuji Hayano, Yokohama (JP); and Yuuki Miyazaki, Yokohama (JP)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Aug. 2, 2021, as Appl. No. 17/391,636.
Claims priority of application No. 10-2020-0178995 (KR), filed on Dec. 18, 2020.
Prior Publication US 2022/0223799 A1, Jul. 14, 2022
Int. Cl. H10K 85/60 (2023.01); H10K 50/11 (2023.01); H10K 101/40 (2023.01)
CPC H10K 85/6572 (2023.02) [H10K 85/636 (2023.02); H10K 50/11 (2023.02); H10K 2101/40 (2023.02)] 12 Claims
OG exemplary drawing
 
1. A light emitting device comprising:
a first electrode;
a second electrode disposed on the first electrode; and
an emission layer disposed between the first electrode and the second electrode, wherein
the first electrode and the second electrode each independently include at least one selected from Ag, Mg, Cu, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF/Ca, LiF/Al, Mo, Ti, W, In, Sn, Zn, an oxide thereof, a compound thereof, and a mixture thereof, and
the emission layer includes a polycyclic compound represented by Formula 1:

OG Complex Work Unit Chemistry
wherein in Formula 1,
m and n are each independently 0 or 1,
o is an integer from 0 to 3,
X1 to X4 are each independently N(Ra), C(Rb)(Rc), O, or S,
Y1 and Y2 are each independently N(Rd), O, or S, and
R1 to R20, and Ra to Rd are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted amine group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 3 to 30 ring-forming carbon atoms.