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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 61.9: Poster

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

Current-Voltage Measurements on Perovskite Thin Films — •Jan Tinz, Martina Stumpp, Christoph Richter, Patrick Hofmann, and Derck Schlettwein — Justus-Liebig-Universität Gießen, Institut für Angewandte Physik, Heinrich-Buff-Ring 16, D-35392 Gießen

The use of methyl ammonium lead iodide (CH₃NH₃PbI₃) as light absorbing material enables the production of efficient and low-cost solar cells due to its high charge carrier mobility. The direct band gap of the perovskite can be controlled by replacing the iodide with bromide to optimize the light absorption. Thin films of CH₃NH₃Pb(I_1−xBr_x)₃ were prepared in a one-step process by spin coating from solutions with different concentrations of lead iodide (PbI₂), methyl ammonium iodide (CH₃NH₃I) and methyl ammonium bromide (CH₃NH₃Br) on these substrates. Depending on the concentration of the solution, the thickness of the synthesized perovskite films varied. Current-voltage measurements were performed and the electrical conductivity of the synthesized perovskite thin films was determined. A basic understanding of the electrical characteristics of these thin layers is required for the development of more efficient hybrid solar cells based on CH₃NH₃Pb(I_1−xBr_x)₃.