A new family of twisted donor-acceptor type thermally activated delayed fluorescence (TADF) emitters comprising pyrido[2,3-b]pyrazine as the acceptor and dihydrophenazasilines donor has been developed. The organic light-emitting diodes fabricated developed achieved a high external quantum efficiency up to 9%. Theoretical calculations implied intermediacy triplet excited state for efficient TADF.

The coupled processes of intermolecular photoinduced forward electron transfer and geminate recombination between the (hole) donor (Rhodamine 3B) and (hole) acceptors (N,N-dimethylaniline) are studied in three molecular liquids: acetonitrile, butyronitrile, and benzonitrile. Two color pump-probe experiments on time scales from approximately 100 fs to hundreds of picoseconds give information abo...

Donor spin in silicon have achieved record values of coherence times and single-qubit gate fidelities. The next stage development involves demonstrating high-fidelity two-qubit logic gates, where the most natural coupling is exchange interaction. To aid efficient design scalable donor-based quantum processors, we model two-electron wave function using a full configuration interaction method wit...