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Berlin 2015 – scientific programme

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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

Wednesday, March 18, 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.

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