High-efficiency all-fluorescent white organic light-emitting diode based on TADF material as a sensitizer.

The use of TADF materials as both sensitizers and emitters is a promising route to achieve high-efficiency all-fluorescent white organic light-emitting diodes (WOLEDs). In this study, the thermally-activated delayed-fluorescent (TADF) material DMAC-TRZ (9,9-dimethyl-9,10-dihydroacridine-2,4,6-triphenyl-1,3,5-triazine) was selected as a sensitizer for the conventional fluorescent emitter DCJTB (4-(dicyanomethylene)-2--butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4-pyran), which was co-doped in a wide bandgap host of DPEPO (bis[2-(diphenylphosphino)phenyl]ether oxide) to fabricate WOLEDs. For the emitting layer of DPEPO:DMAC-TRZ:DCJTB, the DPEPO host can dilute the exciton concentration formed on the DMAC-TRZ sensitizer, which benefits the suppression of exciton quenching.

Tuning the microstructural and magnetic properties of CoFeO/SiO nanocomposites by Cu doping.

Co-Cu ferrite is a promising functional material in many practical applications, and its physical properties can be tailored by changing its composition. In this work, Co Cu FeO (0 ≤ ≤ 0.3) nanoparticles (NPs) embedded in a SiO matrix were prepared by a sol-gel method.