Berlin 2015 – wissenschaftliches Programm

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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 61.1: Poster

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

Processing influence on structural and electronic properties of Lead Methylammonium Tri-Iodide films — •Christian Müller^1,2,3, Bernd Epding¹, Ilknur Yoldas², Robert Lovrincic^2,3, Hans-Hermann Johannes², and Wolfgang Kowalsky^2,3 — ¹Kirchhoff Institut für Physik, Universität Heidelberg — ²Institut für Hochfrequenztechnik, TU Braunschweig — ³InnovationLab GmbH, Heidelberg

Over the last few years the power conversion efficiency of organometal-halide perovskite (such as CH₃NH₃PbI₃) based solar cells has skyrocketed at an unprecedented rate to values around 18 %. This development is even more impressive if we take into account that such high efficiencies can be reached for very different cell, made from different precursor materials, and for both solution and vacuum processed absorber layers. All this approaches have in common that the exact role of the perovskite microstructure for the device performance is to date not well understood. We focus in this work on a comparison between solution vs. vacuum processed perovskite layers and solar cells based thereon. SPM and SEM measurements were performed for the different perovskite films. Thereby we were able to map electronic and structural properties with high spatial resolution. This enables us to directly correlate the obtained data to the device performance.