Helical-caging enables single-emitted large asymmetric full-color circularly polarized luminescence

Abstract

Colorful circularly polarized luminescence materials are desired for 3D displays, information security and asymmetric synthesis, in which single-emitted materials are ideal owing to self-absorption avoidance, evenly entire-visible-spectrum-covered photon emission and facile device fabrication. However, restricted by the synthesis of chiral broad-luminescent emitters, the realization and application of high-performing single-emitted full-color circularly polarized luminescence is in its infancy. Here, we disclose a single-emitted full-color circularly polarized luminescence system (spiral full-color emission generator), composed of whole-vis-spectrum emissive quantum dots and chiral liquid crystals. The system achieves a maximum luminescence dissymmetry factor of 0.8 and remains an order of 10−1 in visible region by tuning its photonic bandgap. We then expand it to a series of desired customized-color circularly polarized luminescence, build chiral devices and further demonstrate the working scenario in the photoinduced enantioselective polymerization. This work contributes to the design and synthesis of efficient chiroptical materials, device fabrication and photoinduced asymmetric synthesis.

One-Dimensional Organic–Inorganic Hybrid Double Perovskites with Near-Unity Photoluminescence Quantum Yield and Advanced Multifunctional Applications

“…The powder can also be directly fashioned into sakura patterns by using custom stencils. As shown in Figure a, taking advantage of the unique broadband emission, we can extract information on flexible film and sakura patterns in RGB channels. , This is achieved by employing lens filters that block wavelengths below 620 nm, pass wavelengths at 520–590 nm, and wavelengths at 420–480 nm, respectively. By combining with other narrowband emission samples, the application of this technology can exhibit highly effective anticounterfeiting capabilities.…”