Periodic Fluorescence Variations of CdSe Quantum Dots Coupled to Aryleneethynylenes with Aggregation-Induced Emission

CdSe nanocrystals and aggregates of an aryleneethynylene derivative are assembled into a hybrid thin film with dual fluorescence from both fluorophores. Under continuous excitation, the molecules exhibit anticorrelated intensity variations, which become periodic at low temperature. We attribute this to structure-dependent aggregation-induced emission derivative, impacts rate excitation energy transfer between nanocrystals. This work highlights that combining semiconductor molecular aggregates, emission, can result in emerging optical properties.