Reversible polymorph-to-amorphous phase transformation based on an aggregation-dependent thermally activated delayed fluorescence emitter

Key Points

• This research aims to explore how polymorphic structures can enhance thermally activated delayed fluorescence in organic materials.
• Synthesis of the benzoimido-benzamide derivative DMAC-PYZ.
• Investigation of phase transformation behavior under aggregation conditions.
• Analysis of its luminescent properties through various thermal treatments.
• Demonstrated that DMAC-PYZ exhibits reversible polymorph to amorphous transformation.
• Showed significant enhancement in luminescence associated with thermally activated delayed fluorescence.
• Identified optimum conditions for achieving enhanced light emission through aggregation.