Light emitting device and polycyclic compound for the same

A light emitting device, comprising:

• a first electrode;
• a second electrode disposed on the first electrode;
• and
• at least one functional layer disposed between the first electrode and the second electrode, and comprising a polycyclic compound represented by Formula 1:
• wherein in Formula 1,
• L is a substituted or unsubstituted arylene group of 6 to 30 ring-forming carbon atoms,
• R1 to R8 are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a substituted or unsubstituted alkyl group of 1 to 20 carbon atoms, a substituted or unsubstituted aryl group of 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group of 2 to 30 ring-forming carbon atoms, or are combined with an adjacent group to form a ring,
• n is 1 or 2, and
• A is a group represented by Formula 2:
• wherein in Formula 2,
• X is O or S,
• R9 to R19 are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group of 1 to 20 carbon atoms, or are combined with an adjacent group to form a ring, and
• at least one of R9 to R19 is bonded to L of Formula 1.