Perovskite-Type Oxynitride Substitution Material

Perovskite-type oxynitrides are developed to substitute materials with critical elements for applications in energy conversion and ICT technologies. The perovskite structure allows diverse anionic and cationic substitution reactions to engineer the band structure, charge carrier density and mobility as well as thermal and ionic transport. The electronic mobility can become high, while the ionic and thermal conductivity can remain low. Strongly correlated electronic systems are addionally employed as design elements for a targeted materials design. Green soft chemistry synthesis methods result in nanostructured regenerative oxynitrides with exceptional properties for e.g. solar water splitting, memristors, pigments or thermoelectric applications. Desired properties can be predicted by theoretical concepts based on a better understanding of the composition–structure–property relationship. The talk will provide a summary on the field of substitutional materials design for high tech applications avoiding critical elements.