Horizontal orientation of the emission transition dipole of TADF molecules plays a critical role on the light outcoupling efficiency and the performance of TADF organic light-emitting diodes.
A hemicurcuminoid boron difluoride complex is used as an emitter in organic light-emitting diodes, showing far red/near-infrared electroluminescence with an external quantum efficiency as high as 2.1%. This dye blended in CBP thin films shows amplified spontaneous emission with a threshold of 22 μJ cm at 750 nm, making this compound attractive for organic semiconductor lasers operating in the near-infrared region.
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