DataVXACS Energy LettersPaper
journal article·2024-02-09Open access

Microstrain and Crystal Orientation Variation within Naked Triple-Cation Mixed Halide Perovskites under Heat, UV, and Visible Light Exposure

Yuqin Zou, Johanna Eichhorn, Jiyun Zhang, Fabian A. C. Apfelbeck, Shanshan Yin, Lukas Wolz, Chun-Chao Chen, Ian D. Sharp, Peter Müller-Buschbaum

ACS Energy Letters· Volume 9· Issue 2
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Source abstract

Abstract

The instability of perovskite absorbers under various environmental stressors is the most significant obstacle to widespread commercialization of perovskite solar cells. Herein, we study the evolution of crystal structure and microstrain present in naked triple-cation mixed CsMAFA-based perovskite films under heat, UV, and visible light (1 Sun) conditions by grazing-incidence wide-angle X-ray scattering (GIWAXS). We find that the microstrain is gradient distributed along the surface normal of the films, decreasing from the upper surface to regions deeper within the film. Moreover, heat, UV, and visible light treatments do not interfere with the crystalline orientations within annealed polycrystalline films. However, when subjected to heat, the naked perovskite films exhibit a rapid component decomposition, induced by phase separation and ion migration. Conversely, under exposure to UV and 1 Sun light soaking, the naked perovskite films undergo a self-optimization structure evolution during degradation and develop into smoother films with reduced surface potential fluctuations.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Solid-state spectroscopy and crystallography

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, Technical University of Munich, James-Franck-Str. 1, 85748 Garching, Germany

Walter Schottky Institute, Technische Universität München, 85748 Garching, Germany

Physics Department, TUM School of Natural Sciences, Technische Universität München, 85748 Garching, Germany

Forschungszentrum Jülich GmbH, Helmholtz-Institute Erlangen-Nürnberg (HI ERN), Immerwahrstraße 2, 91058 Erlangen, Germany

School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China

Technical University of Munich, Heinz Maier-Leibnitz-Zentrum (MLZ), Lichtenbergstr. 1, 85748 Garching, Germany

Funding

Technische Universit?t M?nchen · Deutsche Forschungsgemeinschaft · Center for NanoScience, Ludwig-Maximilians-Universit?t M?nchen · Bayerisches Staatsministerium f?r Bildung und Kultus, Wissenschaft und Kunst · China Scholarship Council · Bayerische Akademie der Wissenschaften · Solar Technologies go Hybrid · H2020 European Research Council

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