Dresden 2017 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 13: Poster: Fundamentals of Perovskite Photovoltaics (joint session CPP, DS, HL)

CPP 13.5: Poster

Montag, 20. März 2017, 18:30–21:00, P1A

Influence of processing parameters on the morphology of perovskite solar cells — •Armin Schreiber, Johannes Schlipf, and Peter Müller-Buschbaum — TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching

Over the last decade, especially lead halide perovskites as an organic-inorganic hybrid compound received attention due to the exceptional rise in the power conversion efficiency (PCE) of research cells from 3.8 % in 2009 to more than 20 % in early 2016. The most common active layer material is methylammonium lead iodide (MAPbI3). It can be fabricated using a solution conversion method consisting of firstly spin-coating lead iodide (PbI2) and secondly immersing it in a solution of dissolved methylammonium iodide. This leads to strong preferential crystal orientations as evidenced by grazing-incidence small angle X-ray scattering (GIWAXS) measurements. The crystal orientation is tunable via temperature variation of precursors of the perovskite and the use of additives into the precursor or conversion solution [1]. We expand this study by the use of mixed solvent approaches with processing additives in order to further tune the time scales of the crystallization processes and gain more control of the film morphologies of perovskite thin films as well as improving the reproducibility and long-term stability.

[1] L. Oesinghaus et al., Adv. Mater. Interfaces 2016, 1600403

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