Berlin 2024 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 33: Hybrid and Perovskite Photovoltaics I

CPP 33.2: Vortrag

Mittwoch, 20. März 2024, 16:45–17:00, H 0106

Time-resolved structure formation in perovskite thin films and powders — •Christopher Greve¹, Konstantin Schötz², Philipp Ramming², Fabian Panzer², Anna Köhler², Helen Grüninger³, and Eva M. Herzig¹ — ¹Dynamik und Strukturbildung - Herzig Group — ²Lehrstuhl für Optoelektronik weicher Materie — ³Inorganische Chemie III - all Universität Bayreuth, 95440 Bayreuth

To shift from a trial-and-error optimization methodology to a more systematic approach in optimizing metal halide perovskite (MHP) processing, it is imperative to enhance the understanding of MHP formation and the subsequent dynamical processes. To improve the understanding of thin film formation from solution we can utilize in situ PL, light scattering and absorption measurements to track the crystallization processes.^[1] However, subsequent dynamic processes within the final MHP film also play a major role, as they define material stability. One example is phase segregation in mixed halide MHP, which we can track with in-situ XRD measurements at various temperatures.^[2] Another tool to study dynamics in MHP films is grazing incidence X-ray correlation spectroscopy, which bulk-sensitive application to films results in altered correlation functions. We present an approach within the sDWBA to identify suitable measurement parameters for the application to MHP thin films.^[3] [1]: Schötz, Greve et al., 10.1002/adom.202101161; [2] Greve, Ramming et al., 10.1021/acsenergylett.3c01878; [3]: Greve et al., 10.1021/acs.langmuir.3c00669

Keywords: metal halide perovskite; structure formation; XRD; XPCS; PL