A new platform for achieving long-term air-stable long persistent luminescence in amorphous organic system

Organic long persistent luminescence (OLPL) materials are at the forefront of research, undergoing rapid evolution due to their extensive potential applications. The realization of hour-level OLPL, particularly an air-stable one, remains a significant challenge. Here, we developed a new platform to achieve long-term air-stable OLPL in an amorphous system through introducing flexible phosphorescence donors as hosts and electron acceptors with the ability to form stable radical anions as guests. Based on this platform, the regulations of OLPL duration times (1.6-7154.3 s) and emission colors (500-680 nm) were easily realized by enhancing the electron-withdrawing ability and increasing the doping concentration of guest molecules, respectively. Additionally, two kinds of non-aromatic chiral substituents were introduced into the phosphorescence hosts, and a rare phenomenon of air-stable circularly polarized organic long persistent luminescence (CP-OLPL) was successfully obtained.