Luminescence of a Polymer Composite Doped with Boron Chelates. Mechanism of Luminescence Sensitization

Boosting organic room-temperature phosphorescence performance through joint luminescence sensitization

“…As is well known, luminescence sensitization can be achieved via intramolecular energy transfer upon excitation of the sensitizer instead of using direct excitation of the weak absorption bands of the host lattice. 27,28 Considering that efficient ISC in traditional metal complexes or thermally activated delayed fluorescence (TADF) have been widely recognized, 29,30 we hypothesize that luminescence sensitization may also be applicable to populate the T 1 state in host-guest doped OURTP systems without the participation of the weak S 1 -T n ISC of the host itself. Additionally, the trace amounts of guest molecules would not disrupt the crystal structure, which is necessary to stabilize the triplet exciton, but rather boost the OURTP performance by acting as triplet exciton activators (Fig.…”

White emission of polymeric luminescent compositions doped with boron chelates

“…Earlier, we showed that boron dibenzoylmethanate in polystyrene (PS)-based PLCs forms exciplexes with the phenyl rings of the polymer [15]. The introduction of boron difluoride anthra-cenoicetonate into this composition leads to the realization of effective radiative energy transfer with the formation of the resulting white radiation [16]. However, a dye (boron difluoride anthra-cenoicetonate) with a low quantum yield of fluorescence was used as an acceptor.…”