Aggregation-induced emission type thermally activated delayed fluorescent materials for high efficiency in non-doped organic light-emitting diodes

• Aggregation induced emission based thermally activated delayed fluorescent emitters.
• Asymmetric substitution of donor moieties for improved efficiency in the delayed fluorescent emitter.
• High efficiency in non-doped thermally activated delayed fluorescent devices.

Aggregation-induced emission (AIE) type thermally activated delayed fluorescent (TADF) emitters were developed by asymmetric substitution of donor moieties to a diphenylsulfone acceptor. The AIE properties of the TADF emitters increased the quantum efficiency of the non-doped TADF devices and asymmetric substitution was more effective than symmetric substitution to enhance the quantum efficiency of the non-doped devices.

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