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 61.3: Poster
Wednesday, March 18, 2015, 15:00–20:00, Poster F
Preparation and Charactarization of Methylammonium Lead Iodide Perovskite Absorber Layers — •David Grabowski, Andrea Jansen, Levent Gütay, Stephan J. Heise, Ingo Riedel, Jürgen Parisi, and Holger Borchert — University of Oldenburg, Department of Physics, Energy and Semiconductor Research Laboratory, 26129 Oldenburg, Germany
Since few years, perovskite thin films have attracted broad attention for application in solar cells: Without extreme efforts spent in technological developments, they already show strong electronic performance. In solar cells, the perovskite layer acts as a light absorber, that carries both electrons and holes. In this work we determine the significance of certain parameters during preparation on the emerging CH3NH3PbI3 perovskite film. Through means of scanning electron microscopy (SEM) and x-ray diffraction (XRD) a one-step method and a two-step method have been compared and the latter proved to be more effective to achieve the desired morphology and crystal structure. Therefore we utilize a two-step method to first apply PbI2 and later on CH3NH3I to create the perovskite, while systematically varying crucial parameters. Through means of the aforementioned measuring equipment we verify advantageous parameters for mixing the solutions and the spin-coating process.