Chiral Phosphine-Copper Iodide Hybrid Cluster Assemblies for Circularly Polarized Luminescence

Chiral chromophores and their ordered assemblies are intriguing for yielding circularly polarized luminescence (CPL) and exploring intrinsic structure-light emission relationships. With the extensively studied chiral organic molecules and inorganic nanoparticle assemblies for the amplified CPL, the assemblies of copper halide hybrid clusters have attracted intensive attention due to their potential efficient CPL. Here, we report robust chiral phosphine-copper iodide hybrid clusters and their layered assemblies in crystalline states for amplified CPL. We reveal that the intermolecular interactions endow the clusters with the capability of assembling into chiral crystalline CPL materials, including hexagonal platelet-shaped microcrystals (g(lum) approximate to 9.5 x 10(-3)) and highly oriented crystalline films (g(lum) approximate to 5 x 10(-3)). Owing to the high crystalline feature of the thin film, we demonstrate an electroluminescent device with bright electroluminescence (1200 cd m(-2)).

Automated summary

The study presents robust chiral phosphine-copper iodide hybrid clusters capable of assembling into different forms of chiral crystalline CPL materials, demonstrating potential applications through the fabrication of an electroluminescent device using highly oriented crystalline films.