Nitrogen Incorporated Photoactive Brownmillerite Ca₂Fe₂O₅ for Energy and Environmental Applications.

ABSTRACT: Ca₂Fe₂O₅ (CFO) is a potentially viable material for alternate energy applications. Incorporation of nitrogen in Ca₂Fe₂O₅ (CFO-N) lattice modifies the optical and electronic properties to its advantage. Here, the electronic band structures of CFO and CFO-N were probed using Ultraviolet photoelectron spectroscopy (UPS) and UV-Visible spectroscopy. The optical bandgap of CFO reduces from 2.21 eV to 2.07 eV on post N incorporation along with a clear shift in the valence band of CFO indicating the occupation of N 2p levels over O 2p in the valence band. Similar effect is also observed in the bandgap of CFO, which is tailored upto 1.43 eV by N⁺ ion implantation. The theoretical bandgaps of CFO and CFO-N were also determ

SUBMITTER: Vavilapalli DS 

PROVIDER: S-EPMC7026084 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature