Structural distortion induced broad emission in vacancy-ordered halide triple perovskites.

Structural distortion in halide perovskites is important to tune the optical properties of the materials. The octahedra formed by metal cations and halide anions in these classes of materials remain symmetric; however, the introduction of asymmetry provides enormous opportunities to improve the photoluminescence emission and excited-state lifetimes for their application in white light emitters. In this work, we have systematically introduced asymmetry in vacancy-ordered halide triple perovskite materials CsMX (M = Bi, Sb; X = Cl, Br, I) by mixing trivalent sites in three different halide compounds.

Electrochemical Performance of Nitrogen-Doped TiO Nanotubes as Electrode Material for Supercapacitor and Li-Ion Battery.

Electrochemical anodized titanium dioxide (TiO) nanotubes are of immense significance as electrochemical energy storage devices owing to their fast electron transfer by reducing the diffusion path and paving way to fabricating binder-free and carbon-free electrodes. Besides these advantages, when nitrogen is doped into its lattice, doubles its electrochemical activity due to enhanced charge transfer induced by oxygen vacancy. Herein, we synthesized nitrogen-doped TiO (N-TiO) and studied its electrochemical performances in supercapacitor and as anode for a lithium-ion battery (LIB).