Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 46, Pages 16558-16562Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201906862
Keywords
FAPbX(3) nanocubes; FAPbX(3) nanoplatelets; ligand-assisted reprecipitation; perovskite nanocrystals; spontaneous crystallization
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Funding
- European Union [839042, 754388]
- Bavarian State Ministry of Science, Research, and Arts through the grant Solar Technologies go Hybrid (SolTech)
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [EXC 2089/1-390776260]
- Alexander von Humboldt Foundation
- Croucher Senior Fellowship
- Research Grants Council of Hong Kong
- German Academic Exchange Service of Germany [G-CityU106/18]
- Marie Curie Actions (MSCA) [839042] Funding Source: Marie Curie Actions (MSCA)
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The growing demand for perovskite nanocrystals (NCs) for various applications has stimulated the development of facile synthetic methods. Perovskite NCs have often been synthesized by either ligand-assisted reprecipitation (LARP) at room temperature or by hot-injection at high temperatures and inert atmosphere. However, the use of polar solvents in LARP affects their stability. Herein, we report on the spontaneous crystallization of perovskite NCs in nonpolar organic media at ambient conditions by simple mixing of precursor-ligand complexes without application of any external stimuli. The shape of the NCs can be controlled from nanocubes to nanoplatelets by varying the ratio of monovalent (e.g. formamidinium(+) (FA(+)) and Cs+) to divalent (Pb2+) cation-ligand complexes. The precursor-ligand complexes are stable for months, and thus perovskite NCs can be readily prepared prior to use. Moreover, we show that this versatile synthetic process is scalable and generally applicable for perovskite NCs of different compositions.
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