A 3-dimensional spiro-functionalized platinum(II) complex to suppress intermolecular pi-pi and Pt center dot center dot center dot Pt supramolecular interactions for a high-performance electrophosphorescent device

A 3-D platinum(II)-based spirometal complex has been designed and synthesized to suppress aggregation and excimer emission. A prototype phosphorescent organic light-emitting device exhibits the high-performance orange emission with an external quantum efficiency of up to 5.2%.