Light emitting element and fused polycyclic compound for the same

A light emitting element 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 emission layer comprises:
• a first compound represented by Formula 1;
• and
• at least one of a second compound represented by Formula HT-1, a third compound represented by Formula ET-1, or a fourth compound represented by Formula M-b:
• wherein, in Formula 1,
• at least one of Ra1 to Ra8 is each independently a group represented by Formula 2,
• the remainder of Ra1 to Ra8 are each independently a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a substituted or unsubstituted oxy group, a substituted or unsubstituted alkyl group having 1 to 60 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 60 carbon atoms, a substituted or unsubstituted aryl group having 6 to 60 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 60 ring-forming carbon atoms,
• at least one of A1 to A8 is each independently a first substituent,
• the remainder of A1 to A8 are each independently a hydrogen atom or a deuterium atom,
• the first substituent is a substituted or unsubstituted germanium group, a substituted or unsubstituted silyl group, a substituted or unsubstituted alkyl group having 1 to 60 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 60 ring-forming carbon atoms,
• A9 and A10 are each independently a hydrogen atom, a deuterium atom, a cyano group, a substituted or unsubstituted alkyl group having 1 to 60 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 60 ring-forming carbon atoms,
• R1 is a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a nitro group, a hydroxyl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted alklythio group, a substituted or unsubstituted alkyl group having 1 to 60 carbon atoms, a substituted or unsubstituted aryl group having 6 to 60 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 60 ring-forming carbon atoms, or is bonded to an adjacent group to form a ring,
• n1 to n4 are each independently an integer from 0 to 3,
• n5 to n7 are each independently an integer from 0 to 2, and
• Rb1 to Rb7 are each independently a hydrogen atom or a deuterium atom;
• wherein in Formula 2,
• m1 is an integer from 0 to 8, and
• X1 is a hydrogen atom, a deuterium atom, a cyano group, or a substituted or unsubstituted alkyl group having 1 to 60 carbon atoms:
• wherein in Formula HT-1,
• L1 is a direct linkage, C(R99)(R100), or Si(R101)(R102),
• X91 is N or C(R103), and
• R91 to R103 are each independently a hydrogen atom, a deuterium atom, a cyano group, a substituted or unsubstituted silyl group, a substituted or unsubstituted oxy group, a substituted or unsubstituted alkyl group having 1 to 60 carbon atoms, a substituted or unsubstituted aryl group having 6 to 60 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 60 ring-forming carbon atoms, or are bonded to an adjacent group to form a ring;
• wherein in Formula ET-1,
• at least one of Y1 to Y3 is each N, and
• the remainder of Y1 to Y3 are each independently C(Ra),
• Ra is a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 60 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 60 ring-forming carbon atoms,
• b1 to b3 are each independently an integer from 0 to 10,
• L1 to L3 are each independently a direct linkage, a substituted or unsubstituted arylene group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 30 ring-forming carbon atoms, and
• Ar1 to Ar3 are each independently a hydrogen atom, a deuterium atom, 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 2 to 30 ring-forming carbon atoms;
• and
• wherein in Formula M-b,
• Q1 to Q4 are each independently C or N,
• C1 to C4 are each independently a substituted or unsubstituted hydrocarbon ring group having 5 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heterocyclic group having 2 to 30 ring-forming carbon atoms,
• e1 to e4 are each independently 0 or 1,
• L21 to L24 are each independently a direct linkage,
• a substituted or unsubstituted divalent alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 30 ring-forming carbon atoms,
• d1 to d4 are each independently an integer from 0 to 4, and
• R31 to R39 are each independently a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, 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 2 to 30 ring-forming carbon atoms, or are bonded to an adjacent group to form a ring.