Tunable Circularly Polarized Luminescence in Sb(3+)-Doped Chiral Indium Halides for Color-Stable White Circularly Polarized Light-Emitting Diodes.

White circularly polarized luminescence (WCPL) materials are highly desirable for advanced optical applications, yet achieving color-stable circularly polarized white LEDs (CP-WLEDs) remains a formidable challenge. Herein, we report a series of chiral hybrid metal halides, ()-(MP)InCl:Sb (()-MP = ()-(-)/()-(+)-2-methylpiperazine, = 0-0.4), which demonstrate efficient and tunable circularly polarized luminescence (CPL). Through precise Sb doping, the emission color can be continuously tuned from blue to white and eventually to yellow. Notably, at an optimal doping concentration of 0.5%, the compound exhibits single-component white light emission with CIE coordinates of (0.32, 0.34) and a dissymmetry factor (||) of ∼1. 3 × 10. A high doping level of 20% yields bright yellow emission with a near-unity photoluminescence quantum yield and an enhanced || of ∼1.7 × 10. The CPL activity originates from the chiral crystal structure induced by hydrogen bonding N-H···Cl between the organic ligands and the asymmetric [In(Sb)Cl] octahedra. Furthermore, a fabricated CP-WLED showcases exceptional operational stability, with negligible shifts in CIE coordinates and correlated color temperature under varying driving currents and operating time. This work provides a novel and robust material platform for developing high-performance, environmentally friendly CP-WLEDs and anticounterfeiting technologies.