Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 72: Hybrid and Perovskite Photovoltaics I
CPP 72.8: Vortrag
Donnerstag, 15. März 2018, 17:15–17:30, C 264
Structural and Compositional Analyses of Perovskite-like Cesium Lead Halides — •Hannah Funk1, Sebastian Caicedo-Davila1, Robert Lovrincic2, Christian Müller2, Michael Sendner2, Frederike Lehmann1, René Gunder1, Alexandra Franz1, Markus Wollgarten1, Benedikt Haas3, Christoph T. Koch3, and Daniel Abou-Ras1 — 1Helmholtz-Zentrum Berlin, Hahn-Meitner-Platz 1, 14109 Berlin, Germany — 2InnovationLab GmbH, Speyerer Straße 4, 69115 Heidelberg, Germany — 3Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany
Inorganic CsPbX3 (X=I, Cl, Br) thin films are investigated as supposedly more stable alternative to methyl-ammonium-containing hybrid perovskite layers for thin-film solar cells. For the present contribution, wide band gap CsPbBr3 thin films were synthesized by spin-coating and coevaporation. In addition, also corresponding powder samples were produced as reference. Structural properties were obtained by X-ray diffraction. To resolve the structure more locally high-resolution images as well as electron diffraction patterns were acquired with a transmission electron microscope. The elemental distributions were analyzed by means of energy-dispersive X-ray spectrometry. The evaluation of these results shows that - in contrast to the powder sample the CsPbBr3 thin films are accompanied by secondary phases such as CsPb2Br5 or Cs4PbBr6. The present contribution will also report on electron beam damage and how to avoid it.