Chiral Hybrid Copper(I) Iodide Single Crystals Enable HighlySelective Ultraviolet-Pumped Circularly Polarized Luminescence Applications br

Light-emitting diodes (LEDs) with the circularly polarized luminescencefeatures have attracted attention to the promising applications ranging from solid-state lightingand displays to bioencoding and anticounterfeiting. The prerequisite of circularly polarizedluminescence is highly emissive chiral materials. Here, we demonstrated that (R/S-MBA)4Cu4I8middot2H2O (MBA =alpha-methylbenzylaminium) and acentric Gua6Cu4I10(Gua =guanidinium) single crystals were grown on the basis of Gua3Cu2I5by the slow evaporationmethod. (R/S-MBA)4Cu4I8middot2H2O single crystals exhibited excellent circularly polarizedluminescence (CPL) characteristics. More importantly, ultraviolet-pumped LEDs (UV-LEDs)based on (R/S-MBA)4Cu4I8middot2H2O and Gua6Cu4I10single crystals exhibit a higher opticalselectivity when exposed to right-handed and left-handed circular polarization (RCP and LCP)conditions. (S-MBA)4Cu4I8middot2H2O single crystals and Gua6Cu4I10single crystals induced bythe (R)-MBA cation exhibit the different polarized light intensities at PL peak positions indifferent lambda/4 waveplate polarizer angle directions, which provides new possibilities for thefurther applications from 3D displays to spintronics, as well as anticounterfeiting.