Research progress in nonreciprocal chiral luminescent materials
Nonreciprocal circularly polarized luminescent(CPL)films show circularly polarized emission with opposite chirality from their two sides.Simply flipping such films can achieve chirality inversion in circularly polarized absorption and emission.Therefore,this newly emergent type of chiral film demonstrates both great significance in scientific research and promising application potentials.So far,the nonreciprocal characteristics observed in CPL are extremely rare.The investigations are anticipated to provide a solid scientific base for further exploring novel CPL-active switchable and adjustable materials.This article focuses on chiral luminescent film materials,introducing the concept,scientific mechanism,and research areas of nonreciprocal chiral properties in material systems such as chiral organic dye films,chiral crystal films,chiral helical polymer films,and composite chiral film devices.Additionally,the challenges faced by nonreciprocal CPL-active materials and future research directions are discussed.
nonreciprocitychiroptical modulationcircularly polarized luminescenceorganic functional filmchiral luminescent material