CPC H10K 85/631 (2023.02) [C07F 5/027 (2013.01); C09K 11/06 (2013.01); H10K 85/615 (2023.02); H10K 85/633 (2023.02); C09K 2211/1007 (2013.01); C09K 2211/1011 (2013.01); H10K 50/11 (2023.02); H10K 59/35 (2023.02); H10K 2101/10 (2023.02)] | 22 Claims |
1. A light emitting device comprising:
a first electrode;
a second electrode facing the first electrode; and
at least one emission layer disposed between the first electrode and the second electrode, wherein
the at least one emission layer comprises a polycyclic compound represented by Formula 1:
![]() wherein in Formula 1,
a to c are each independently 1 or 2,
X1 and X2 are each independently O or N(Ra),
Ra is a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted amine group, a substituted or unsubstituted boryl group, a substituted or unsubstituted oxy group, a substituted or unsubstituted thio 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,
Y1 to Y3 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 boryl group, a substituted or unsubstituted oxy group, a substituted or unsubstituted thio 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, and
at least one of Y1 to Y3 is a group represented by Formula Z1 or Formula Z2,
provided that when X1 and X2 are each O:
at least one of Y2 is a group represented by Formula Z1; and
at least one of Y1 is a tert-butyl group; and
at least one of Y3 is a tert-butyl group:
![]() wherein in Formula Z1 and Formula Z2,
d is 0 or 1, and
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