Proceedings of MATSUS23 & Sustainable Technology Forum València (STECH23) (MATSUS23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.256
Publication date: 22nd December 2022
A unique approach to exploring non-equilibrium synthesis parameter spaces of oxide thin film photoelectrodes will be presented, broadening the pathway toward discovering new chemical spaces inaccessible through conventional solid-state reactions.
There is an increasingly urgent need for disruptive and innovative materials that satisfy the chemical and physical requirements to reduce global warming through sustainable development. Fortunately, only a fraction of the possible combinations were studied, making it likely that the best materials are still awaiting discovery. Unfortunately, designing controlled synthesis routes of single-phase oxides with low defects concentration will become more difficult as the number of elements increases;1,2 and there are currently no robust and proven strategies for identifying promising multi-elemental systems.
These challenges demand an initial focus on synthesis parameters of novel non-equilibrium synthesis approaches rather than chemical composition parameters by high-throughput combinatorial investigations of synthesis-parameter spaces, opening new avenues for stabilizing metastable materials, discovering new chemical spaces, and obtaining light-absorbers with enhanced properties to study their physical working mechanisms in photoelectrochemical energy conversion.
Using two non-equilibrium synthesis tools: pulsed laser deposition and flash photonic sintering, can form gradients in synthesis parameters without modifying composition parameters, which enables reproducible, high-throughput combinatorial synthesis over large-area substrates and high-resolution observation and analysis. Even minor changes in synthesis significantly impact material properties, physical working mechanisms, and performances, demonstrated by the relationship between synthesis conditions, crystal structures of α-SnWO4,3 and properties over a range of thicknesses of CuBi2O4,1 both emerging light-absorbers for photoelectrochemical water-splitting used as model multinary oxides. Our approach addresses an immediate need by focusing on novel non-equilibrium synthesis approaches of disruptive and innovative materials that meet the chemical and physical requirements for reducing global warming through sustainable development.
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