Fig. 1: Chiral plasmonic NPs in the emissive layer of CP-OLEDs.

a–c Schematics and scanning electron microscopy (SEM) images of the chiral plasmonic NPs. The 432 helicoid IV NPs (a) show rhombic-dodecahedral shapes. The 432 helicoid III NPs (b) are of a cubic geometry, with the six faces exhibiting pinwheel-like patterns. The nanotriskelions (c) exhibit the anisotropic geometric morphology with triskelion-shaped wrinkles on the top and bottom surfaces. The L-and D-type chiral NPs were obtained from L- and D-GSH, respectively. The distorted edges of the chiral NPs are shown by the orange arrows. All scale bars share the same value. d TDBC monomer, schematically represented by a pink platelet. e, f Schematics illustrating the chirality transfer from the chiral plasmonic NPs to the emission of the CP-OLEDs, generating circularly polarized luminescence. The chiral emissions result from either the formation of chiral excitons (e) or the modulation by chiral plasmon resonance (f). g Schematic diagrams illustrating the device structures of the CP-OLEDs in this work. h Photographs showing a typical CP-OLED device and its electroluminescence (inset).