| CPC H10K 85/6572 (2023.02) [C07F 5/02 (2013.01); H10K 50/12 (2023.02); H10K 50/81 (2023.02); H10K 50/82 (2023.02)] | 22 Claims |
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1. A light emitting device comprising:
a first electrode;
a second electrode disposed on the first electrode; and
a light emitting layer disposed between the first electrode and the second electrode, and including a polycyclic compound, 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, Mo, Ti, W, In, Sn, Zn, an oxide thereof, a compound thereof, and a mixture thereof, and
the polycyclic compound includes:
a phenyl group;
a first substituent substituted at the phenyl group, and represented by Formula A-1;
a second substituent substituted at the phenyl group at an ortho position with respect to the first substituent; and
a third substituent substituted at the phenyl group at an ortho position with respect to the first substituent and at a meta position with respect to the second substituent, wherein
the second substituent and the third substituent are each independently a group represented by Formula A-2:
 Rd is a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted amine group, a substituted or unsubstituted silyl group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 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 2 to 30 ring-forming carbon atoms, or is bonded to an adjacent group to form a ring, and
wherein in Formulas A-1 and A-2,
 represents a binding site to the phenyl group.
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