Circularly Polarized Organic Room Temperature Phosphorescence from Amorphous Copolymers

Organic optoelectronic functional materials featuring circularly polarized emission and persistent luminescence represent a novel research frontier and show promising applications in data encryption, displays, biological imaging, and so on. Herein, we present a simple and universal approach to achieve circularly polarized organic phosphorescence (CPP) from amorphous copolymers by the incorporation of axial chiral chromophores into polymer chains via radical cross-linked polymerization. Our experimental data reveal that copolymers (R/S)-PBNA exhibit a maximum CPP efficiency of 30.6% and the largest dissymmetric factor of 9.4 x 10(-3) and copolymers (R/S)-PNA show the longest lifetime of 0.68 s under ambient conditions. Given the CPP property of these copolymers, their potential applications in multiple information encryption and displays are demonstrated, respectively. These findings not only lay the foundation for the development of amorphous polymers with superior CPP but also expand the outlook of room-temperature phosphorescent materials.

Automated summary

The study demonstrates that circularly polarized organic phosphorescence (CPP) can be achieved by incorporating axial chiral chromophores into polymer chains, with copolymers showing a maximum CPP efficiency of 30.6% and a lifetime of 0.68 seconds. These copolymers have promising potential applications in information encryption and displays.