Organic light-emitting device including heterocyclic compound with boron and nitrogen
摘要
說明書
By way of summation and review, a DABNA-based thermally activated delayed fluorescence (TADF) compound has been considered. In this compound, multiple resonance between an N atom and a B atom separates a highest occupied molecular orbital (HOMO) and a lowest unoccupied molecular orbital (LUMO) such that TADF characteristics are exhibited, and a large overlap exists between HOMO and LUMO, thereby providing high luminescence efficiency. Since the structural change before and after transition is small, the full width at half maximum (FWHM) and the stokes shift are small. However, a ΔEST value may be relatively large. Thus, an exciton lifetime (Tau) value may increase and roll-off characteristics may be large with high current density driving.
As described above, embodiments may provide a compound having a lower ΔEST value while having structural differentiation, and a device including the same.
Example embodiments have been disclosed herein, and although specific terms are employed, they are used and are to be interpreted in a generic and descriptive sense only and not for purpose of limitation. In some instances, as would be apparent to one of ordinary skill in the art as of the filing of the present application, features, characteristics, and/or elements described in connection with a particular embodiment may be used singly or in combination with features, characteristics, and/or elements described in connection with other embodiments unless otherwise specifically indicated. Accordingly, it will be understood by those of skill in the art that various changes in form and details may be made without departing from the spirit and scope of the present invention as set forth in the following claims.
