Light emitting element and polycyclic compound for light emitting element

A light emitting element, comprising:

• a first electrode;
• a second electrode on the first electrode;
• and
• an emission layer between the first electrode and the second electrode, and comprising a first compound represented by Formula 1, and at least one selected from among a second compound to a fourth compound,
• wherein the first compound to the fourth compound are different from each other:
• wherein in Formula 1,
• R1 to R7 are each independently an amino group comprising at least two selected from among an unsubstituted phenyl group, an unsubstituted naphthyl group, an unsubstituted dibenzofuran group, and an unsubstituted carbazole group, a hydrogen atom, a deuterium atom, a substituted or unsubstituted phenyl group, a substituted or unsubstituted carbazole group, or a substituted or unsubstituted alkyl group,
• at least one pair selected from among pairs of two neighboring substituents selected from among R8 to R11 is bonded to *α and *β of Formula 2, respectively, and
• wherein the cases in which *α is bonded to R10, and *β is bonded to R9, *α is bonded to R8, and *β is bonded to R9, and *α is bonded to R10, and *β is bonded to R11 are excluded,
• substituents selected from among R8 to R11 that are not bonded to Formula 2 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthryl group, a substituted or unsubstituted diphenyl amino group, a substituted or unsubstituted carbazole group, a substituted or unsubstituted acridine group, a substituted or unsubstituted phenothiazine group, or a substituted or unsubstituted phenoxazine group, and
• R12 to R18 are each independently an amino group comprising at least two selected from among an unsubstituted phenyl group, an unsubstituted naphthyl group, an unsubstituted dibenzofuran group, and an unsubstituted carbazole group, a hydrogen atom, a deuterium atom, a substituted or unsubstituted phenyl group, a substituted or unsubstituted carbazole group, or a substituted or unsubstituted alkyl group.