CPL-active hybrid copper(Ⅰ) halides enabled by cation inclusion with chiral crown-ether

Chiral hybrid metal halides with high photoluminescence quantum yield（PLQY） and superior dissymmetry factor(glum) are promising candidates for circularly polarized luminescence（CPL） emitting sources.However,it is a great challenge to achieve both high glumand large PLQY.Here,we report a new supramolecular strategy to fabricate chiral hybrid Cu（Ⅰ）-halides with nearunity quantum yields and intense CPL emissions.The dissymmetry factor can be dramatically modulated by tuning the hostguest complexations.Attributing to the chirality and variable conformations of the host-guest complexes,a series of chiral[G@LR/S]2Cu4I6 have been prepared.The incorporation of different cations within the chiral LR/Shosts leads to variations of packing modes along the c-axis and different extent of distortions in the[Cu4I6]2-polyhedra.Among them,[H3O@LR/S]+cations are stacked based on Van der Waals interactions and hierarchically self-assemble into a right/left-handed helix in[H3O@LR/S]2Cu4I6,which results in a high glumof-7×10-3and a large PLQY of 96.92%.Notably,[G@LR/S]2Cu4I6 shows promising applications in single-component white light emitting diodes（WLEDs）,exhibiting a maximum dissymmetry factor of -1.2×10-3.The effective host-guest complexation and oriented hierarchical self-assembly provide an effective strategy for the development of high-performance CPL materials.