Patent ID: 10873041

Abstract:
A condensed cyclic compound that emits high-efficiency delayed fluorescence is provided. The compound may be represented by Formula 1, in which A is a moiety represented by Formula 1-1. In Formula 1-1, X1 may be a carbon or silicon atom linked to B1 and B2, and X2 may be a carbon or silicon atom linked to B3 and B4. When the compound represented by Formula 1 satisfies ES1<2ET1<ET2 (wherein ES1 is the first singlet energy level, ET1 is the first triplet energy level, and ET2 is the second triplet energy level of the condensed cyclic compound), an energy transition to a second triplet state may be disfavored during up-conversion of the condensed cyclic compound from a triplet state to a singlet state through interaction with an adjacent molecule in a triplet energy state.