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Synthesis of Air-Stable CdSe/ZnS Core–Shell Nanoplatelets with Tunable Emission Wavelength
dc.contributor.author | Polovitsyn, Anatolii | |
dc.contributor.author | Dang, Zhiya | |
dc.contributor.author | Movilla, Jose L. | |
dc.contributor.author | Martín García, Beatriz | |
dc.contributor.author | Khan, Ali Hossain | |
dc.contributor.author | Bertrand, Guillaume H. V. | |
dc.contributor.author | Brescia, Rosaria | |
dc.contributor.author | Moreels, Iwan | |
dc.date.accessioned | 2017-07-19T09:24:41Z | |
dc.date.available | 2017-07-19T09:24:41Z | |
dc.date.issued | 2017 | |
dc.identifier.citation | POLOVITSYN, Anatolii, et al. Synthesis of Air-Stable CdSe/ZnS Core-Shell Nanoplatelets with Tunable Emission Wavelength. Chemistry of Materials, 2017, vol. 29, no 13, p. 5671–5680 | ca_CA |
dc.identifier.issn | 0897-4756 | |
dc.identifier.issn | 1520-5002 | |
dc.identifier.uri | http://hdl.handle.net/10234/168385 | |
dc.description.abstract | In the past few years, several protocols have been reported on the synthesis of CdSe nanoplatelets with narrow photoluminescence (PL) spectrum, high PL quantum efficiency, and short exciton lifetime. The corresponding core/shell nanoplatelets are however still mostly based on CdSe/CdS, which possess an extended lifetime and a strong red shift of the band-edge absorption and emission, in accordance with a quasi-type-II band alignment. Here we report on a robust synthesis procedure to grow a ZnS shell around CdSe nanoplatelets at moderate temperatures of 100–150 °C, to improve the optical properties of CdSe nanoplatelets via a type-I core/shell heterostructure. The shell growth is performed under ambient atmosphere, in either toluene or 1,2-dichlorobenzene. The variation of the shell thickness induces a continuous red shift of the PL peak, eventually reaching 611 nm. The PL quantum efficiency is increased compared to the original CdSe cores, with values up to 60% depending on the shell thickness. High-resolution transmission electron microscopy reveals a bending of the nanoplatelets caused by strain due to 12% lattice mismatch between CdSe and ZnS. The present procedure can easily be translated to other core/shell nanocrystals, such as CdSe/CdS and CdSe/CdZnS nanoplatelets. | ca_CA |
dc.description.sponsorShip | The present publication is realized with the support of the Ministero degli Affari Esteri e della Cooperazione Internazionale (IONX-NC4SOL). This project has also received funding from the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 696656 (GrapheneCore1). J.L.M. acknowledges support from UJI project P1-1B2014-24 and MINECO project CTQ2014-60178-P. | |
dc.format.extent | 10 p. | ca_CA |
dc.format.mimetype | application/pdf | ca_CA |
dc.language.iso | eng | ca_CA |
dc.publisher | American Chemical Society | |
dc.relation.isPartOf | Chemistry of Materials, 2017, vol. 29, no 13 | ca_CA |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | nanocrystals | ca_CA |
dc.subject | CdSe/ZnS Core–Shell Nanoplatelets | |
dc.subject | photoluminescence | |
dc.title | Synthesis of Air-Stable CdSe/ZnS Core–Shell Nanoplatelets with Tunable Emission Wavelength | ca_CA |
dc.type | info:eu-repo/semantics/article | ca_CA |
dc.identifier.doi | https://doi.org/10.1021/acs.chemmater.7b01513 | |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | ca_CA |
dc.relation.publisherVersion | http://pubs.acs.org/doi/abs/10.1021/acs.chemmater.7b01513 | ca_CA |
dc.type.version | info:eu-repo/semantics/publishedVersion | ca_CA |
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