Bandgap lowering in mixed alloys of Cs2Ag(SbxBi1−x)Br6 double perovskite thin films

Seán Kavanagh, David Scanlon and Aron Walsh of the TYC recently co-authored a paper with colleagues; 'Bandgap lowering in mixed alloys of Cs2Ag(SbxBi1−x)Br6 double perovskite thin films' which was published in the Journal of Materials Chemistry A.

In this work, the authors demonstrate a novel route to lowering the electronic bandgaps of halide double perovskites, an emerging class of lead-free 'perovskite-inspired' materials, making them more suitable for photovoltaic and photocatalytic applications.Through a powerful combination of experimental and theoretical characterisation, they identify non-linear orbital mixing upon cation-site alloying as the origin of this intriguing behaviour.

https://pubs.rsc.org/en/journals/journalissues/ta#!issueid=ta008041&type=current&issnprint=2050-7488

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