Unusual Phase Formation in Reactively Sputter‐Deposited La—Co—O Thin‐Film Libraries

Abstract

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adem.202201050.

Sputter‐Deposited La–Co–Mn–O Nanocolumns as Stable Electrocatalyst for the Oxygen Evolution Reaction

“…[31,32] For reactively sputtered La-based oxide systems, there are only a few reports in the literature on similar columnar growth. A comparable structure formation was observed during hot sputter deposition of La-Co-O, [33] whereas nanostructure formation was observed for a Sr-and Ag-substituted La-Co-O system. [34,35] The SEM image in Figure 2b shows the columns in a pristine, as-grown state in top view.…”

“…[ 19–21 ] In a previous study, it was demonstrated that reactive combinatorial sputtering is an excellent method to fabricate and study La‐based perovskites. [ 22 ] It was shown that Mn is beneficial for the conductivity in La–Co‐perovskite films and hence crucial for electrocatalytic measurements. This was also reported by other groups.…”

Combinatorial Sputter Synthesis of Single‐Phase La(XYZ)O3 ± σ Perovskite Thin‐Film Libraries: A New Platform for Materials Discovery

“…However, a single‐phase formation behavior was recently observed and described by the authors for reactive hot deposition of (La‐based) perovskites. [ 16 ] This phase formation behavior can be leveraged to synthesize phase‐pure perovskite MLs for a wide range of chemical compositions of the B‐sites. It can be described as a self‐organized growth process based on the perovskite stoichiometry, which suppresses formation of multiphase regions in favor of single‐phase perovskite.…”