高分子长余辉发光材料研究进展

Recent Development of Polymers with Long-lived Persistent Luminescence

高分子长余辉发光材料具有无定态结构、可加工性能好、发光寿命长、成本低廉等优点,对拓展纯有机长余辉发光材料的应用具有重要意义。为了实现高分子发光材料的长余辉发射,当前主要是利用杂原子或者重原子的自旋轨道耦合作用,提高单/三线态激子间的系间窜越能力;高分子基质中的氢键、卤键、离子键等分子内和分子间相互作用为磷光基团提供刚性环境,抑制其三线态激子的非辐射跃迁和猝灭。基于此,本文综述了近年来高分子长余辉发光材料的研究进展,以及在未来发展过程中面临的机遇与挑战。

Polymers with long-lived persistent luminescence have exhibited the characteristics of amorphous structure,excellent process properties,long luminescence lifetime and low cost,which were important to develop the potential application for the pure organic long-lived persistent luminescent materials.In order to obtain the polymers with long-lived persistent luminescence,the current method was to utilize the spin-orbit coupling of heteroatom or heavy atom to improve the inter-system crossing channels of singlet and triplet excitons;and polymer matrix with intramolecular and intermolecular interactions of hydrogen bond,halogen bonding,ionic band and so on will provide the rigid environment for phosphorescent groups to restrain the non-radiative transition and quenching of triplet excitons.Based on these,this article reviewed the research progress of polymers with long-lived persistent luminescence in recent years,as well as put forward the opportunities and challenges in the future development process.