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On the Shape-Selected, Ligand-Free Preparation of Hybrid Perovskite (CH<sub>3</sub>NH<sub>3</sub>PbBr<sub>3</sub>) Microcrystals and Their Suitability as Model-System for Single-Crystal Studies of Optoelectronic Properties

On the Shape-Selected, Ligand-Free Preparation of Hybrid Perovskite (CH3NH3PbBr3) Microcrystals and Their Suitability as Model-System for Single-Crystal Studies of Optoelectronic Properties

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BAHNMÜLLER, Ulrich Johannes, Henning KUPER, Tobias SEEWALD, Yenal YALҪINKAYA, Jörg August BECKER, Lukas SCHMIDT-MENDE, Stefan A. L. WEBER, Sebastian POLARZ, 2021. On the Shape-Selected, Ligand-Free Preparation of Hybrid Perovskite (CH3NH3PbBr3) Microcrystals and Their Suitability as Model-System for Single-Crystal Studies of Optoelectronic Properties. In: Nanomaterials. MDPI. 11(11), 3057. eISSN 2079-4991. Available under: doi: 10.3390/nano11113057

@article{Bahnmuller2021-11-13Shape-56531, title={On the Shape-Selected, Ligand-Free Preparation of Hybrid Perovskite (CH3NH3PbBr3) Microcrystals and Their Suitability as Model-System for Single-Crystal Studies of Optoelectronic Properties}, year={2021}, doi={10.3390/nano11113057}, number={11}, volume={11}, journal={Nanomaterials}, author={Bahnmüller, Ulrich Johannes and Kuper, Henning and Seewald, Tobias and Yalҫinkaya, Yenal and Becker, Jörg August and Schmidt-Mende, Lukas and Weber, Stefan A. L. and Polarz, Sebastian}, note={Article Number: 3057} }

Yalҫinkaya, Yenal 2022-02-11T09:44:25Z Becker, Jörg August Seewald, Tobias 2021-11-13 On the Shape-Selected, Ligand-Free Preparation of Hybrid Perovskite (CH<sub>3</sub>NH<sub>3</sub>PbBr<sub>3</sub>) Microcrystals and Their Suitability as Model-System for Single-Crystal Studies of Optoelectronic Properties Becker, Jörg August Polarz, Sebastian Schmidt-Mende, Lukas 2022-02-11T09:44:25Z Kuper, Henning Attribution 4.0 International Seewald, Tobias Yalҫinkaya, Yenal Bahnmüller, Ulrich Johannes Kuper, Henning Hybrid perovskite materials are one of the most promising candidates for optoelectronic applications, e.g., solar cells and LEDs, which can be produced at low cost compared to established materials. Although this field of research has seen a huge upsurge in the past decade, there is a major lack in understanding the underlying processes, such as shape-property relationships and the role of defects. Our aerosol-assisted synthesis pathway offers the possibility to obtain methylammonium lead bromide (MAPbBr<sub>3</sub>) microcrystals from a liquid single source precursor. The differently shaped particles are aligned on several substrates, without using a directing agent or other additives. The obtained particles show good stability under dry conditions. This allows us to characterize these materials and their pure surfaces at the single-crystal level using time- and spatially resolved methods, without any influences of size-dependent effects. By optimizing the precursor for the aerosol process, we were able to eliminate any purification steps and use the materials as processed. In addition, we performed theoretical simulations to deepen the understanding of the underlying processes in the formation of the different crystal facets and their specific properties. The model system presented provides insights into the shape-related properties of MAPbBr<sub>3</sub> single crystals and their directed but ligand-free synthesis. Bahnmüller, Ulrich Johannes Schmidt-Mende, Lukas eng Weber, Stefan A. L. Weber, Stefan A. L. Polarz, Sebastian

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