Enhanced Infrared Emission from Rare-Earth Double Perovskite Embedded in Fluoride Glass with Different B-Site Cation Structures for NO Sensing in a Hydrogen Stream.

Rare-earth halide perovskites can lead to a distinctive infrared luminescence. However, achieving tunable infrared luminescence presents significant challenges. The leptons of their f-f ubiquitous forbidden ring influence the energy level splitting, and the substitution of atoms in perovskite by rare-earth ions also distorts the crystal structure.

Surface Reconstruction of Lead-Free Perovskite CsAgNaInCl:Bi by Hydroxylation with Blue-Light-Excited Performance.

Molecular surface reconfiguration strategies have been instrumental to performance improvements of halide perovskite photovoltaic applications in recent years. However, research into the optical properties of the lead-free double perovskite CsAgInCl on the complex reconstructed surface is still lacking. Here, blue-light excitation in double perovskite CsNaAgInCl with Bi doping has been successfully achieved by excess KBr coating and ethanol-driven structural reconstruction.

Efficient Removal of Perfluorinated Chemicals from Contaminated Water Sources Using Magnetic Fluorinated Polymer Sorbents.

Efficient removal of per- and polyfluoroalkyl substances (PFAS) from contaminated waters is urgently needed to safeguard public and environmental health. In this work, novel magnetic fluorinated polymer sorbents were designed to allow efficient capture of PFAS and fast magnetic recovery of the sorbed material. The new sorbent has superior PFAS removal efficiency compared with the commercially available activated carbon and ion-exchange resins.

Mid-Infrared Luminescence of the High Stability Perovskite CsPbErBr-ZrF-BaF-LaF-AlF-NaF Fluoride Glass.

Perovskites have been studied because of their adjustable wavelength range, high color purity, and wide color gamut. However, they still face some problems such as poor stability and insufficient infrared luminescence. The perovskite glass can improve the stability and luminescence properties of the perovskite.

Novel cryogenic dual-emission mechanism of lead-free double perovskite CsAgInCl and using SiO to enhance their photoluminescence and photostability.

Lead halide perovskite have attracted world-wide attention regarding their serious hazards on ecological environment and human health. To improve both the emission intensity and stability of CsAgInCl, this study explores using SiO to structurally adjust CsAgInCl. Note that including SiO changed the growth style and crystal morphology of CsAgInCl from an octahedron to a truncated octahedron.

Epitaxial growth of highly stable perovskite CsPbBr/nZnS/Al core/multi-shell quantum dots with aluminium self-passivation.

As a new type of colloidal nanocrystals, perovskite quantum dots (QDs) have received widespread attention. Water and oxygen in the air can affect the luminous efficiency of quantum dots, which can degrade the surface of QDs and affect their luminescence efficiency. Herein we discuss the synthesis of high-quality QDs using an uncomplicated coating method by which an ultrathin epitaxial Al self-passivation layer bearing homogeneous ligands can be coated on the QDs.

Stable Luminescence of CsPbBr/CdS Core/Shell Perovskite Quantum Dots with Al Self-Passivation Layer Modification.

Perovskite quantum dots (PQDs) are among the most important luminescent semiconducting materials; however, they are unstable. Exposure to light, heat, and air can lead to irreversible degradation, which results in fluorescence quenching. Therefore, defects in PQDs significantly limit their practical application.