Chiral polymeric fibers-integrated circularly polarized luminescence: topological amplification, dynamic control, and flexible applications

Circularly polarized luminescence (CPL)-active polymeric fibers (CPL-PFs) have emerged as a cutting-edge platform integrating chiral topology, dynamic optical response, and mechanical flexibility, offering unique advantages for applications in 3D displays, anti-counterfeiting, and flexible optoelectronics. By combining molecular chirality with hierarchical fiber architectures, CPL-PFs exhibit tunable dissymmetry factors (glum) and stimuli-responsive CPL/circularly polarized persistent luminescence properties, enabled by precise molecular design or supramolecular assembly pathways. This review systematically summarizes the recent decade’s progress in CPL-PFs, categorizing them into microscopic nanofibers (e.g., self-assembly, template method) and macroscopic continuous fibers (e.g., electrospinning or mechanical twisting). Key design strategies for chiral moieties and luminophores, as well as fabrication methodologies for CPL-PFs, are examined in terms of their effects on chiroptical performance. This review also highlights applications in information security displays and circularly polarized organic light-emitting diodes, emphasizing the synergy between structural anisotropy and CPL amplification. Despite advances, challenges persist in achieving high glum values, environmental stability, and scalable production. Future research will focus on developing systems with tunable molecular states to enable high-performance integrated luminescence and dynamic CPL switching. This review aims to inspire interdisciplinary efforts to unlock the full potential of CPL-PFs in next-generation flexible technologies.