Pressure response of decylammonium-containing 2D iodide perovskites.

ABSTRACT: Manipulation by external pressure of the optical response of 2D Metal Halide Perovskites (MHPs) is a fascinating route to tune their properties and promote the emergence of novel features. We investigate here DA₂PbI₄ and DA₂GeI₄ (DA = decylammonium) perovskites in the pressure range up to ∼12 GPa by X-ray powder diffraction, absorption, and photoluminescence spectroscopy. Although the two systems share a similar structural evolution with pressure, the optical properties are rather different and influenced by Pb or Ge. DA₂PbI₄ shows a progressive red shift from 2.28 eV (P = 0 GPa) to 1.64 eV at 11.5 GPa, with a narrow PL emission, whereas DA₂GeI₄, changes from a non-PL system at ambient pressure t

SUBMITTER: Morana M 

PROVIDER: S-EPMC8957026 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature