Encapsulation of luminescent gold(iii) complexes by metal–organic frameworks results in enhanced phosphorescence in open air, solid state two-photon-induced phosphorescence, and reusable photo-catalysts under aerobic conditions.
Metal-TADF (thermally activated delayed fluorescence) emitters hold promise in the development of next generation light-emitting materials for displaya nd lighting applications,examples of which are,however,largely confined to Cu I and recently Au I ,A g I ,a nd Au III emitters.H erein is described the design strategy for an unprecedented type of metal-TADF emitter based on inexpensive tungsten metal chelated with Schiff base ligand that exhibit high emission quantum yields of up to 56 %insolutions and 84 %inthin-film (5 wt %i n1 ,3-bis(N-carbazolyl)benzene,m CP) at room temperature.F emtosecond time-resolved emission (fs-TRE) spectroscopya nd DFT calculations were undertaken to decipher the TADF properties.S olution-processed OLEDs fabricated with the W-TADF emitter demonstrated external quantum efficiency (EQE) and luminance of up to 15.6 %and 16890 cd m À2 ,r espectively.
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