Regensburg 2022 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 4: Perovskite and Photovoltaics 1 (joint session HL/CPP/KFM)

KFM 4.3: Vortrag

Montag, 5. September 2022, 10:00–10:15, H34

Structural properties of (hot-)pressed MAPbI₃ films revealed by detailed temperature-dependent optical analyses — •Christina Witt¹, Konstantin Schötz¹, Nico Leupold², Simon Biberger¹, Philipp Ramming¹, Ralf Moos², and Fabian Panzer¹ — ¹Soft Matter Optoelectronics, University of Bayreuth, Bayreuth 95440, Germany — ²Department of Functional Materials, University of Bayreuth, Bayreuth 95440, Germany

Halide perovskites attracted much attention in recent years, due to the remarkable increase in corresponding solar cell efficiencies. More recently, hot-pressing has emerged as attractive method for manufacturing and post-treatment of perovskite films [1, 2]. However, a detailed understanding regarding the role of temperature during hot-pressing on resulting film properties is still missing. Thus, we use temperature-dependent PL and absorption measurements of MAPbI₃ thin films pressed with different temperatures and in detail analyze their optical properties. This allows us to draw conclusions about structural and optoelectronic properties, revealing that an increased temperature improves film morphology, structural and optoelectronic film properties.

[1] Witt, C. et al. Impact of Pressure and Temperature on the Compaction Dynamics and Layer Properties of Powder-Pressed Methylammonium Lead Halide Thick Films. ACS Appl. Electron. Mater. 2020, 2 (8), 2619-2628.

[2] Pourdavoud, N. et al. Room-Temperature Stimulated Emission and Lasing in Recrystallized Cesium Lead Bromide Perovskite Thin Films. Adv. Mater. 2019, 31, 1903717.