Fasbeteende och elektroniska egenskaper hos halogenid-perovskiter från simulering på atomskala
Forskningsprojekt , 2020 – 2024

Halide perovskites have seen a surge in activity over the last years thanks to their potential for applications in light harvesting and emission technologies. Compositional engineering through mixing on different sublattices is essential for achieving optimal performance. While new halide perovskite composition are being developed largely through systematic optimization and trial-and-error approaches, we contend that this situation can be substantially improved by computational modeling.

Here, we therefore propose a comprehensive research project that involves (1) model construction and development of associated tools, (2) analyzing phase behavior and predicting phase diagrams, and (3) mapping associated electronic properties, including those of polarons and defects, as a function of composition and temperature. In this context, we will consider subsystems of CsPb1-xSnxI3-y-zBryClz following a gradual increase in complexity during the course of the project. The project is based on the systematic construction of atomic scale models, referred to as graph potentials, which are intermediate between complex machine learning models such as Gaussian approximation potentials and lattice models such as cluster and force constant expansions. By involving both computational/theoretical and experimental researchers, the goal of the present project is to lead to better understanding and a more allow rational design of new materials.

Deltagare

Paul Erhart (kontakt)

Biträdande professor vid Chalmers, Fysik, Kondenserad materie- och materialteori

Julia Wiktor

Forskarassistent vid Chalmers, Fysik, Kondenserad materie- och materialteori

Samarbetspartners

Technische Universität Darmstadt

Darmstadt, Germany

University of Cambridge

Cambridge, United Kingdom

Finansiering

Vetenskapsrådet (VR)

Projekt-id: 2020-04935
Finansierar Chalmers deltagande under 2020–2024

Publikationer

Mer information

Senast uppdaterat

2021-02-08