Research Progress of Rare Earth-Based Circularly Polarized Lumines-cent Materials
As a special and important light,circularly polarized light(CPL)has shown unprecedented potentials in the ap-plications of advanced three-dimensional(3D)displays,organic optoelectronic devices,security inks,and biological or chemical probes.Luminescence dissymmetry factor(gum)and quantum yields(Φ)are important factors that adopted to eval-uate the magnitudes of CPL signals.Most chiral luminescent materials have low glum values due to the low magnetic-dipole transition moments.Attributing to the unique photophysical,optoelectronic properties and magnetic-dipole allowed transi-tions,chiral rare earth materials are promising candidates for circularly polarized luminescent materials possessing both large glum and high Φ.Herein,a comprehensive and up-to-date overview of the research progress of rare earth-based circularly polarized luminescent materials is presented,which contains:(i)the developments of visible light,near-infrared light(NIR)and two-photon circularly polarized luminescence;(ii)the effects of ligands,solvents,anions,supermolecular self-assembly,external stimulus on the circularly polarized luminescence performances;(iii)the applications in circularly polarized-organic light-emitting diodes(CP-OLED),biosensing,detection,and security devices.Finally,current challenges and future opportu-nities are discussed.
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