Correlated anharmonicity and dynamic disorder control carrier transport in halide perovskites
Maximilian J. Schilcher, David Abramovitch, Matthew Z. Mayers, Liang Z. Tan, David R. Reichman, David A. Egger
Abstract
Charge transport characteristics in optoelectronic devices play a crucial role in their efficiency. Research over the past decades has established strategies to alter charge transport behavior through material design. However, when atomic motion becomes complex at elevated, application-relevant temperatures, the established structure-property relations are less predictive. In this work, the authors take a major step to solve this critical problem by quantitatively connecting vibrational anharmonicity and dynamic disorder in model anharmonic semiconductors. It is reported that the materials' correlated behavior determine carrier mobilities and their temperature dependencies in halide perovskites, establishing these phenomena as knobs to tune key optoelectronic properties of important optoelectronic materials.