SKM 2021 – wissenschaftliches Programm
CPP 5.10: Poster
Dienstag, 28. September 2021, 17:30–19:30, P
Tailoring the orientation of perovskite crystals via adding two-dimensional polymorphs for perovskite solar cells — •Renjun Guo1, Ali Buyruk2, Xinyu Jiang1, Wei Chen1, Lennart K. Reb1, Manuel A. Scheel1, Tayebeh Ameri2, and Peter Müller-Buschbaum1 — 1Physik-Department, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany — 2Chemie-Department, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13 (E), 81377 München, Germany
Due to their outstanding properties, organic-inorganic perovskite materials are gaining increasing attention for their use in high-performance solar cells. Finding an effective method of defect passivation is thought to be a promising path for advancements toward narrowing the distribution of the power conversion efficiency (PCE) values, as measured by the spread in the PCE over different devices fabricated under identical conditions, for easier commercialization. We add 2*(4*fluoroph-enyl)ethyl ammonium iodide (p-f-PEAI) into the bulk of a mixed cation lead halide perovskite film in this study. The addition of the appropriate amount of p-f-PEAI affects the preference orientation of the perovskite crystals, increases the strength of the crystal texturing, and reduces non-radiative charge recombination. As a result, we achieve a tighter range of the PCE of perovskite solar cells (PSCs) without losing the PCE values obtained .
 Guo et al. J. Phys. Energy 2, 034005 (2020)