A Universal Strategy for Multi-Color Organic Circularly Polarized Afterglow Materials with High Dissymmetry Factor

Materials with pure organic circularly polarized afterglow (CPA) are notable for their multi-dimensional optical characteristics due to their time-dependent afterglow and polarization properties. These attributes endow them with exceptional appeal and value in the realms of information storage and anti-counterfeiting measures. Currently, there are limited studies on multi-color CPA materials with both high dissymmetry factor (glum) values and long lifetimes. Here, we propose a universal strategy to prepare multi-color CPA materials spanning from blue to red, with an ultralong emission lifetime of over 6 s and a glum of up to 100 (the highest glum was 1.90). This strategy leverages the mechanism of radiative energy transfer and selective reflection of cholesteric liquid crystals. Through multi-layered assembly, our method offers a simple and universal means of constructing organic CPA materials for multi-dimensional information encryption.