Bandgap lowering in mixed alloys of Cs<sub>2</sub>Ag(Sb<sub>x</sub>Bi<sub>1−x</sub>)Br<sub>6</sub> double perovskite thin films
Zewei Li, Seán R. Kavanagh, Mari Napari, Robert G. Palgrave, Mojtaba Abdi-Jalebi, Zahra Andaji-Garmaroudi, Daniel W. Davies, Mikko Laitinen, Jaakko Julin, Mark A. Isaacs, Richard H. Friend, David O. Scanlon, Aron Walsh, Robert L. Z. Hoye
Abstract
Reductions in the bandgap of Cs<sub>2</sub>AgBiBr<sub>6</sub> and Cs<sub>2</sub>AgSbBr<sub>6</sub> thin films are achieved through alloying due to non-linear mixing of Bi and Sb orbitals.
Topics & Concepts
Materials scienceThin filmBand gapPerovskite (structure)Mixing (physics)OptoelectronicsMetallurgyWide-bandgap semiconductorCondensed matter physicsComposite materialPerovskite Materials and ApplicationsOptical properties and cooling technologies in crystalline materialsThermal Expansion and Ionic Conductivity