Lead‐based perovskite light‐emitting diodes (PeLEDs) have exhibited excellent purity, high efficiency, and good brightness. In order to develop nontoxic, highly luminescent metal halide perovskite materials, tin, copper, germanium, zinc, bismuth, and other lead‐free perovskites have been developed. Here, a novel 0D manganese‐based (Mn‐based) organic–inorganic hybrid perovskite with the red emission located at 629 nm, high photoluminescence quantum yield of 80%, and millisecond level triplet lifetime is reported. When applied as the emissive layer in the PeLEDs, the maximum recording brightness of devices after optimization is 4700 cd m−2, and the peak external quantum efficiency is 9.8%. The half‐life of the device reaches 5.5 h at 5 V. The performance and stability of Mn‐based PeLEDs are one order of magnitude higher than those of other lead‐free PeLEDs. This work clearly shows that the Mn‐based perovskite will provide another route to fabricate stable and high‐performance lead‐free PeLEDs.

Constructing multifunctional characteristics toward advanced electromagnetic interference shielding materials in harsh environments has become a development trend. Herein, the wood-derived magnetic porous carbon composites with a highly ordered anisotropic porous architecture were successfully fabricated through a pyrolysis procedure. The three-dimensional porous skeleton inherited from the wood stock serves as an electrically conductive network and incorporates magnetic Ni nanoparticles homogeneously and firmly embedded within the carbon matrix that can further improve the electromagnetic attenuation capacity. The optimized Ni/porous carbon (PC) composite exhibits an exceptional electromagnetic interference (EMI) shielding effectiveness of 50.8 dB at the whole X band (8.2–12.4 GHz) with a low thickness (2 mm) and an ultralow density (0.288 g/cm3) and simultaneously possesses an extraordinary compressive strength (11.7 MPa) and a hydrophobic water contact angle (152.1°). Our study provides an alternative strategy to utilize green wood-based materials to design multifunctional EMI shielding composites.

The formability of antiperovskite [MX4]­XA3-type (A­(I) = alkali metals; M­(II) = transition metals; X = Cl, Br, I) can be predicted by building the analysis theory. To validate the prediction model, a series of cesium–manganese antiperovskite single crystals with different halogen mixing ratios were synthesized, which not only have [MX4]­XA3-type structures but also are ideal luminescent materials. As the most pure green emission fluorescent antiperovskite, [MnCl2Br2]­BrCs3 shows 520 nm emission with the high photoluminescence quantum yield (93.5%) at room temperature and ultrastable luminescent color from 77 to 523 K due to the strict confinement of high-density luminescent centers. By fabricating the perovskite film with the double-source thermal evaporation method, the first all-inorganic cesium–manganese halide antiperovskite light-emitting diode is reported, with maximum external quantum efficiency up to 12.5%, maximum luminance up to 3990 cd m–2, and half-life of 756 min operated at 5.0 V.

The perovskite light‐emitting diode (PeLED) based on lead has the advantages of excellent purity, high efficiency, and good brightness. In order to develop a highly luminescent and deep blue lead halide perovskite light emitting diode, here, a two‐dimensional layered lead perovskite owning the high deep blue photoluminescence quantum yield 80% at 445 nm is reported. In addition, the maximum recording brightness and the peak external quantum efficiency of the PeLED is 1315 cd m−2 and 3.08%, respectively, which outdoes that of previously reported deep blue lead PeLEDs. The half‐life of the device reaches 3.5 h at 5 V. This work clearly shows that the layered lead perovskite will provide a route to fabricate stable and high‐performance deep blue emission PeLEDs.

Bio-mass materials have been selected as one of the advanced electromagnetic (EM) functional materials due to its natural porous framework for dynamically and flexibly optimizing the EM response property. Herein,...