High Dissymmetry Factor Supramolecular Structured Circularly Polarized Room‐Temperature Phosphorescence: Materials Design and Performance Tuning

Abstract Circularly polarized luminescence (CPL) materials have significant potential in areas like data encryption, biological imaging, and optoelectronics. Among these, long‐lived circularly polarized phosphorescence (CPP) materials are emerging as a promising research frontier. Supramolecular structures offer advantages over traditional molecular designs, allowing precise control of molecular architecture for CPP. While there has been substantial progress in this field in the past two years, a comprehensive exploration of supramolecular CPP strategies is still missing in the literature. This review summarizes recent developments in supramolecular CPP materials, highlighting the three essential conditions for achieving CPP. The materials are classified into four types: single‐component self‐assembly, copolymer/cocrystals, organic‐inorganic hybrid, and bilayer CPP films. Supramolecular structures improve luminescence dissymmetry and quantum yield via exciton coupling and chiral amplification. The review also discusses optimization of CPP properties, including dissymmetry factor, lifetime and quantum yield, and emission spectrum. The potential applications of CPP‐based materials in organic light‐emitting diodes and data security are explored. Finally, the review provides insights into performance adjustment, material synthesis, mechanism clarification, and future applications, aiming to guide the development of CPP materials for cutting‐edge optoelectronic technologies.