Regensburg 2016 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 11: Poster: Hybrid and Perovskite Photovoltaics

CPP 11.12: Poster

Montag, 7. März 2016, 18:15–21:00, Poster B2

X-Ray Absorption Spectroscopy of Hybrid Organic-Inorganic Perovskites: Theory and Experiment — •C. Vorwerk¹, C. Hartmann², C. Cocchi¹, G. Sadoughi³, S. Habisreutinger³, R. Félix², R.G. Wilks^2,4, H. Snaith³, P. Becker², J. Just², T. Unold², K. Hannewald^1,5, M. Bär^2,4,6, and C. Draxl^1,5 — ¹Institut für Physik, Humboldt-Universität zu Berlin, 12489 Berlin, Germany — ²Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 14109 Berlin, Germany — ³Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom — ⁴Energy Materials In-Situ Laboratory Berlin (EMIL), Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany — ⁵Fritz-Haber-Institut der Max-Planck-Gesellschaft, 14195 Berlin, Germany — ⁶Institut für Physik und Chemie, Brandenburgische Technische Universität Cottbus-Senftenberg, 03046 Cottbus, Germany

We present a joint experimental and theoretical study of the x-ray absorption spectra (XAS) of the hybrid organic-inorganic perovskite methyl ammonium lead triiodide CH₃NH₃PbI₃ - a promising material for photovoltaic energy conversion. The Pb M_4,5 and I L_2,3 absorption edges of the perovskite were measured in partial fluorescence and total electron yield modes at the HiKE endstation located at the KMC-1 beamline of the BESSY II light source. The corresponding ab-initio calculations are performed using all-electron many-body theory (DFT+BSE), as implemented in the exciting code.