Berlin 2015 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 61: Posters III (Organic-inorganic perovskite semiconductors; Organic photovoltaics and electronics; Photovoltaics; Energy science; New materials and concepts)

HL 61.7: Poster

Mittwoch, 18. März 2015, 15:00–20:00, Poster F

Electrical Characterization of Methyl Ammonium Lead Iodide — •Raffael Rueß, Martina Stumpp, Christoph Richter, Patrick Hofmann, and Derck Schlettwein — Justus-Liebig-Universität Gießen, Institut für Angewandte Physik, Heinrich-Buff-Ring 16, D-35392 Gießen

Methyl ammonium lead iodide (CH₃NH₃PbI₃) is a trihalide perovskite semiconductor with promising and well-fitting parameters for the use as an absorber in hybrid solar cells. Homogeneous layers can be prepared by spin coating solutions of methyl ammonium iodide (CH₃NH₃I) and lead iodide (PbI₂) onto a substrate and annealing afterwards. In this work, the perovskite films were deposited via a two-step sequential deposition method. Current-voltage measurements were performed to determine the electrical conductivity of the perovskite film. An interesting hysteresis in the I-V measurements was observed corresponding to similar observations in perovskite solar cells and three possible reasons were discussed. Understanding the electrical behavior of perovskites, such as CH₃NH₃PbI₃, is important for finding further improvements on the efficiency of hybrid solar cells based on these materials.