Regensburg 2019 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 39: Focus: Controlling Phase Formation Dynamics in Solution Processed Semiconductors - organized by Christoph Brabec, Jens Harting and Hans-Joachim Egelhaaf
CPP 39.11: Talk
Wednesday, April 3, 2019, 18:30–18:45, H14
Following the perovskite crystallization in printed mesoscopic organometal halide perovskite solar cells — •Oliver Filonik1, Margret Eva Thordardottir1,2, Jenny Lebert1, Stephan Pröller1, Sebastian Weiss1, Lew Jia Haur3, Anish Priyadarshi3, Nripan Mathews3, Peter Müller-Buschbaum2, and Eva M. Herzig1,4 — 1TU München, Munich School of Engineering, Herzig Group, 85748 Garching, Germany — 2TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching, Germany — 3Energy Research Institute @ NTU (ERI@N), Research Techno Plaza, 637553 Singapore, Singapore — 4Universität Bayreuth, Physikalisches Institut, Herzig Group - Dynamik und Strukturbildung, 95440 Bayreuth, Germany
Printable perovskite solar cells based on carbon electrodes have shown outstanding device stability and upscalability in recent years. In this work, we follow the perovskite crystallization within the all-porous device architecture during fabrication and investigate the influence of the processing additive aminovaleric acid iodide (5-AVAI) on the perovskite formation. Using time-resolved grazing incidence wide angle X-ray scattering (GIWAXS), we are able to identify the suppression of large polycrystalline grains early in the fabrication process due to the processing additive. With the optimized processing conditions, an improved material backfilling and a significant device performance increase from (1.22 +- 0.03)% up to (10.69 +- 0.44)% is achieved. Our results grant us a better understanding of the initial perovskite crystallization phases and are of key importance for further developments.