1.
ACS Appl Mater Interfaces
; 11(42): 38648-38653, 2019 Oct 23.
Artigo
em Inglês
| MEDLINE
| ID: mdl-31577119
RESUMO
Developing environmentally friendly, stable, and narrow and direct band gap halide perovskite materials has attracted substantial interest because of their wide range of potential applications. Here, an all-inorganic Pb-free halide double perovskite, Cs2NaVCl6, was prepared by the solid-state reaction method and hydrothermal method. Cs2NaVCl6 crystallizes in the cubic Fm3Ì m space group with the unit parameter a = 10.3497(14) Å. The combined density functional theory and experimental study demonstrates that the compound is a direct band gap semiconductor with a band gap of â¼2.64 eV. More importantly, it exhibits strong visible and near-infrared light absorptions and markedly ambient and thermal stability.