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 61.9: Poster
Wednesday, March 18, 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(I1−xBrx)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(I1−xBrx)3.