Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation
In this work, we demonstrate a facile method for colloidal lead halide perovskite nanoplatelet synthesis (Chemical formula: L2[ABX3]n-1BX4, L: butylammonium and octylammonium, A: methylammonium or formamidinium, B: lead, X: bromide and iodide, n: number of [BX6]4- octahedral layers in the direction...
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| Format: | Article |
| Language: | English |
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MyJove Corporation
2020
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| Online Access: | https://hdl.handle.net/1721.1/125490 |
| _version_ | 1811094565961072640 |
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| author | Ha, Seung Kyun Tisdale, William |
| author2 | Massachusetts Institute of Technology. Department of Chemical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Chemical Engineering Ha, Seung Kyun Tisdale, William |
| author_sort | Ha, Seung Kyun |
| collection | MIT |
| description | In this work, we demonstrate a facile method for colloidal lead halide perovskite nanoplatelet synthesis (Chemical formula: L2[ABX3]n-1BX4, L: butylammonium and octylammonium, A: methylammonium or formamidinium, B: lead, X: bromide and iodide, n: number of [BX6]4- octahedral layers in the direction of nanoplatelet thickness) via ligand-assisted reprecipitation. Individual perovskite precursor solutions are prepared by dissolving each nanoplatelet constituent salt in N,N-dimethylformamide (DMF), which is a polar organic solvent, and then mixing in specific ratios for targeted nanoplatelet thickness and composition. Once the mixed precursor solution is dropped into nonpolar toluene, the abrupt change in the solubility induces the instantaneous crystallization of nanoplatelets with surface-bound alkylammonium halide ligands providing colloidal stability. Photoluminescence and absorption spectra reveal emissive and strongly quantum-confined features. X-ray diffraction and transmission electron microscopy confirm the two-dimensional structure of the nanoplatelets. Furthermore, we demonstrate that the band gap of perovskite nanoplatelets can be continuously tuned in the visible range by varying the stoichiometry of the halide ion(s). Lastly, we demonstrate the flexibility of the ligand-assisted reprecipitation method by introducing multiple species as surface-capping ligands. This methodology represents a simple procedure for preparing dispersions of emissive 2D colloidal semiconductors. |
| first_indexed | 2024-09-23T16:02:06Z |
| format | Article |
| id | mit-1721.1/125490 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T16:02:06Z |
| publishDate | 2020 |
| publisher | MyJove Corporation |
| record_format | dspace |
| spelling | mit-1721.1/1254902022-09-29T17:46:22Z Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation Ha, Seung Kyun Tisdale, William Massachusetts Institute of Technology. Department of Chemical Engineering In this work, we demonstrate a facile method for colloidal lead halide perovskite nanoplatelet synthesis (Chemical formula: L2[ABX3]n-1BX4, L: butylammonium and octylammonium, A: methylammonium or formamidinium, B: lead, X: bromide and iodide, n: number of [BX6]4- octahedral layers in the direction of nanoplatelet thickness) via ligand-assisted reprecipitation. Individual perovskite precursor solutions are prepared by dissolving each nanoplatelet constituent salt in N,N-dimethylformamide (DMF), which is a polar organic solvent, and then mixing in specific ratios for targeted nanoplatelet thickness and composition. Once the mixed precursor solution is dropped into nonpolar toluene, the abrupt change in the solubility induces the instantaneous crystallization of nanoplatelets with surface-bound alkylammonium halide ligands providing colloidal stability. Photoluminescence and absorption spectra reveal emissive and strongly quantum-confined features. X-ray diffraction and transmission electron microscopy confirm the two-dimensional structure of the nanoplatelets. Furthermore, we demonstrate that the band gap of perovskite nanoplatelets can be continuously tuned in the visible range by varying the stoichiometry of the halide ion(s). Lastly, we demonstrate the flexibility of the ligand-assisted reprecipitation method by introducing multiple species as surface-capping ligands. This methodology represents a simple procedure for preparing dispersions of emissive 2D colloidal semiconductors. United States. Department of Energy. Office of Basic Energy Sciences (Award DE-SC0019345) National Science Foundation (U.S.) (Award DMR-08-19762) 2020-05-27T13:41:25Z 2020-05-27T13:41:25Z 2019-10 2020-01-15T18:27:54Z Article http://purl.org/eprint/type/JournalArticle 1940-087X https://hdl.handle.net/1721.1/125490 Ha, Seung Kyun and William A Tisdale. “Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation.” Journal of visualized experiments 152 (2019): e60114 © 2019 The Author(s) en https://dx.doi.org/10.3791/60114 Journal of visualized experiments Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf MyJove Corporation Journal of Visualized Experiments (JOVE) |
| spellingShingle | Ha, Seung Kyun Tisdale, William Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation |
| title | Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation |
| title_full | Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation |
| title_fullStr | Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation |
| title_full_unstemmed | Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation |
| title_short | Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation |
| title_sort | facile synthesis of colloidal lead halide perovskite nanoplatelets via ligand assisted reprecipitation |
| url | https://hdl.handle.net/1721.1/125490 |
| work_keys_str_mv | AT haseungkyun facilesynthesisofcolloidalleadhalideperovskitenanoplateletsvialigandassistedreprecipitation AT tisdalewilliam facilesynthesisofcolloidalleadhalideperovskitenanoplateletsvialigandassistedreprecipitation |