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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 49: Poster Session II
CPP 49.13: Poster
Dienstag, 17. März 2020, 14:00–16:00, P1A
In-situ Observation of Perovskite Formation Upon Deposition of Tin Iodide onto Formamidinium Iodide — •Jonas Glaser, Jonas Horn, and Derck Schlettwein — Justus Liebig University Gießen, Institute of Applied Physics
As lead-based organic-inorganic halide perovskite solar cells have emerged as promising technology for low-cost and highly efficient photovoltaics, issues such as upscaling the manufacturing process and the toxicity of lead are put into focus of interest. Substituting lead by tin, originated in the same main-group with similar properties, yielded solar cell devices with power conversion efficiencies close to 10 %. Usually, tin-based perovskites are prepared via spin-coating from a precursor solution containing formamidinium iodide (FAI) and tin iodide (SnI2). A different approach consists in the interdiffusion method, which combines spin-coating of the organic part with subsequent physical vapor deposition of SnI2 and final annealing [1]. In order to study the formation of the perovskite phase in detail, an experimental setup for in-situ optical characterization of formamidinium tin iodide (FASnI3) has been established, in order to study the transformation of the organic base-layer into the target perovskite through stepwise evaporation of SnI2 and/or annealing.
1. J. Xi, Z. Wu, B. Jiao, H. Dong, C. Ran, C. Piao, T. Lei, T.-B. Song, W. Ke, T. Yokoyama, X. Hou, M. G. Kanatzidis, Adv. Mater. 29, 1606964 (2017).