Dresden 2020 – wissenschaftliches Programm

Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

CPP: Fachverband Chemische Physik und Polymerphysik

CPP 49: Poster Session II

CPP 49.20: Poster

Dienstag, 17. März 2020, 14:00–16:00, P1A

Optical properties of electrons interacting with rotating molecules — •Volker Karle, Areg Ghazaryan, and Mikhail Lemeshko — Institute of Science and Technology Austria (IST Austria), Am Campus 1 3400 Klosterneuburg, Österreich

Recently solar panels based on halide perovskites have seen a tremendous increase in efficiency. However, the key mechanism responsible for this efficiency remains obscure [1]. In this project we theoretically investigate the interactions between electrons and molecules and calculate the resulting change in the absorption coefficient, which can be related to quantum efficiency. The main idea is based on the fact that rotating molecules can exchange angular momentum with the electrons [2]. Furthermore, electrons can decrease their ground-state energy by building up correlations with the molecules. This changes their absorption and mobility properties and could be used for tuning material properties.

[1] T. Chen, W.-L. Chen, B. J. Foley, J. Lee, J. P. Ruff, J. P. Ko, C. M. Brown, L. W. Harriger, D. Zhang, C. Park, and others, Proceedings of the National Academy of Sciences 114, 7519 (2017).

[2] D. H. Fabini, T. A. Siaw, C. C. Stoumpos, G. Laurita, D. Olds, K. Page, J. G. Hu, M. G. Kanatzidis, S. Han, and R. Seshadri, Journal of the American Chemical Society 139, 16875 (2017).