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 49.14: Poster

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

Morphological effects of cesium incorporation in mixed organic mixed halide perovskites — Lennart Klaus Reb, •Manuel Andree Scheel, Renjun Guo, and Peter Müller-Buschbaum — TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany

Sunlight is one of the most promising energy source towards a sustainable future power generation. In the emerging field of new-generation thin-film photovoltaics, perovskite solar cells recently surpassed a power conversion efficiency of 25 % and are therefore a promising complement or even alternative for the commercially established silicon-based solar cells. Especially the highly tunable chemical composition of the perovskite layer allows optimizing the hybrid crystal structure in a way to profit from its unique optoelectronic properties. The incorporation of the alkali metal cation cesium (Cs) into the perovskite lattice has been shown to be beneficial for properties of the perovskite layer by influencing the crystal size and orientation in thin-films. Understanding and controlling the bulk film morphology is therefore essential for highly stable and efficient perovskite solar cells. In this work, we apply statistically relevant grazing-incidence wide-angle X-ray scattering (GIWAXS) to investigate the effect of Cs incorporation on the film morphology. In particular, we investigate the popular (FAPbI₃)₈₃(MAPbBr₃)₁₇ perovskite composition in thin-films with different Cs contents and discuss the influence of Cs on their bulk film morphology with focus on the crystallinity.