Decoupling the impact of bulk and surface point defects on the photoelectrochemical properties of LaFeO₃ thin films.

ABSTRACT: Point defects (PDs) play a key role in the properties of semiconductor photoelectrodes, from doping density to carrier mobility and lifetime. Although this issue has been extensively investigated in the context of photovoltaic absorbers, the role of PDs in photoelectrodes for solar fuels remains poorly understood. In perovskite oxides such as LaFeO₃ (LFO), PDs can be tuned by changing the cation ratio, cation substitution and oxygen content. In this paper, we report the first study on the impact of bulk and surface PDs on the photoelectrochemical properties of LFO thin films. We independently varied the La : Fe ratio, within 10% of the stoichiometric value, in the bulk and at the surface by tuning the precursor composition as well as selective acid etching. The structure and com

SUBMITTER: Sun X 

PROVIDER: S-EPMC9517707 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature