Size-tunable and stable cesium lead-bromide perovskite nanocubes with near-unity photoluminescence quantum yield
| Autor: | Nicola Margiotta, Mihai Irimia-Vladu, Elisabetta Fanizza, Marinella Striccoli, Ignazio Allegretta, Davide Altamura, Roberto Grisorio, Roberto Terzano, Gian Paolo Suranna, Cinzia Giannini, Daniele Conelli |
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| Přispěvatelé: | Grisorio, R., Conelli, D., Fanizza, E., Striccoli, M., Altamura, D., Giannini, C., Allegretta, I., Terzano, R., Irimia-Vladu, M., Margiotta, N., Suranna, G. P. |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Photoluminescence
Materials science General Engineering Analytical chemistry perovskites Quantum yield Nanoparticle Bioengineering 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Nanomaterials chemistry.chemical_compound chemistry Nanocrystal Oleylamine Bromide General Materials Science 0210 nano-technology nanomaterials Perovskite (structure) |
| Zdroj: | Nanoscale advances Online 3 (2021): 3918–3928. doi:10.1039/d1na00142f info:cnr-pdr/source/autori:Grisorio R.; Conelli D.; Fanizza E.; Striccoli M.; Altamura D.; Giannini C.; Allegretta I.; Terzano R.; Irimia-Vladu M.; Margiotta N.; Suranna G.P./titolo:Size-tunable and stable cesium lead-bromide perovskite nanocubes with near-unity photoluminescence quantum yield/doi:10.1039%2Fd1na00142f/rivista:Nanoscale advances Online/anno:2021/pagina_da:3918/pagina_a:3928/intervallo_pagine:3918–3928/volume:3 |
| DOI: | 10.1039/d1na00142f |
| Popis: | Stable cesium lead bromide perovskite nanocrystals (NCs) showing a near-unity photoluminescence quantum yield (PLQY), narrow emission profile, and tunable fluorescence peak in the green region can be considered the ideal class of nanomaterials for optoelectronic applications. However, a general route for ensuring the desired features of the perovskite NCs is still missing. In this paper, we propose a synthetic protocol for obtaining near-unity PLQY perovskite nanocubes, ensuring their size control and, consequently, a narrow and intense emission through the modification of the reaction temperature and the suitable combination ratio of the perovskite constituting elements. The peculiarity of this protocol is represented by the dissolution of the lead precursor (PbBr2) as a consequence of the exclusive complexation with the bromide anions released by the in situ SN2 reaction between oleylamine (the only surfactant introduced in the reaction mixture) and 1-bromohexane. The obtained CsPbBr3 nanocubes exhibit variable size (ranging from 6.7 ± 0.7 nm to 15.2 ± 1.2 nm), PL maxima between 505 and 517 nm, and near-unity PLQY with a narrow emission profile (fwhm of 17–19 nm). Additionally, the NCs synthesized with this approach preserve their high PLQYs even after 90 days of storage under ambient conditions, thus displaying a remarkable optical stability. Through the rationalization of the obtained results, the proposed synthetic protocol provides a new ground for the direct preparation of differently structured perovskite NCs without resorting to any additional post-synthetic treatment for improving their emission efficiency and stability. |
| Databáze: | OpenAIRE |
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