The rational design of organic light-emitting devices (OLEDs) has transformed display and lighting technologies by enabling efficient conversion of electrical energy to light. However, a fundamental limitation persists: due to spin statistics following charge recombination , 75% of excitons formed in conventional organic emitters are triplets , which typically undergo non-radiative decay. This inherent loss mechanism has driven the search for molecular architectures capable of harvesting triplet states for emission .