Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 44, Pages 13887-13892Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201707224
Keywords
oriented attachment; perovskite nanowires; polarized emission; self-assembly; ultrasonication
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Funding
- Bavarian State Ministry of Science, Research, and Arts through the grant Solar Technologies go hybrid (SolTech)
- China Scholarship Council
- Alexander von Humboldt Stiftung
- Flemish Fund for Scientific Research (FWO Vlaanderen)
- European Research Council (ERC Starting Grant) [335078-COLOURATOMS]
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The colloidal synthesis and assembly of semiconductor nanowires continues to attract a great deal of interest. Herein, we describe the single-step ligand-mediated synthesis of single-crystalline CsPbBr3 perovskite nanowires (NWs) directly from the precursor powders. Studies of the reaction process and the morphological evolution revealed that the initially formed CsPbBr3 nanocubes are transformed into NWs through an oriented-attachment mechanism. The optical properties of the NWs can be tuned across the entire visible range by varying the halide (Cl, Br, and I) composition through subsequent halide ion exchange. Single-particle studies showed that these NWs exhibit strongly polarized emission with a polarization anisotropy of 0.36. More importantly, the NWs can self-assemble in a quasi-oriented fashion at an air/liquid interface. This process should also be easily applicable to perovskite nanocrystals of different morphologies for their integration into nanoscale optoelectronic devices.
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