Abstract: Described are multi-resonance-thermally-activated delay-fluorescence compounds containing (i) a polycyclic aromatic/heteroaromatic ligand in which a plurality aromatic/heteroaromatic rings are linked by boron and nitrogen atoms and (ii) an N-heterocyclic carbene ligand, with both ligands coordinated to a metal atom/ion that has a high spin-orbit coupling. The use of the high spin-orbit coupling of metals and/or metal ions facilitates the intersystem crossing and/or reversed intersystem crossing processes of MR-TADF emitters, thereby largely accelerating the rate of TADF and substantially shortening the lifetime of deleterious triplet excitons. The MR-TADF emitters can be used to fabricate blue to green emitting OLEDs.

Abstract: Provided is a multi-user live streaming method, applicable to a terminal. The method includes: displaying a live streaming interface of a first live streaming room; displaying, in response to the first live streaming room satisfying a live streaming room consolidation condition, a consolidation selection list; sending, in response to a select operation on a target client in the consolidation selection list, a live streaming room consolidation request to the target client via a server; and displaying, in the live streaming interface of the first live streaming room, the target client added to the first live streaming room.