Synthesis of CdSe and CdSe/ZnS Quantum Dots with Tunable Crystal Structure and Photoluminescent Properties
Mastery over the structure of nanocrystals is a powerful tool for the control of their fluorescence properties and to broaden the range of their applications. In this work, the crystalline structure of CdSe can be tuned by the precursor concentration and the dosage of tributyl phosphine, which is ve...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/17/2969 |
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| author | Jingling Li Haixin Zheng Ziming Zheng Haibo Rong Zhidong Zeng Hui Zeng |
| author_facet | Jingling Li Haixin Zheng Ziming Zheng Haibo Rong Zhidong Zeng Hui Zeng |
| author_sort | Jingling Li |
| collection | DOAJ |
| description | Mastery over the structure of nanocrystals is a powerful tool for the control of their fluorescence properties and to broaden the range of their applications. In this work, the crystalline structure of CdSe can be tuned by the precursor concentration and the dosage of tributyl phosphine, which is verified by XRD, photoluminescence and UV-vis spectra, TEM observations, and time-correlated single photon counting (TCSPC) technology. Using a TBP-assisted thermal-cycling technique coupled with the single precursor method, core–shell QDs with different shell thicknesses were then prepared. The addition of TBP improves the isotropic growth of the shell, resulting in a high QY value, up to 91.4%, and a single-channel decay characteristic of CdSe/ZnS quantum dots. This work not only provides a facile synthesis route to precisely control the core–shell structures and fluorescence properties of CdSe nanocrystals but also builds a link between ligand chemistry and crystal growth theory. |
| first_indexed | 2024-03-10T01:28:02Z |
| format | Article |
| id | doaj.art-b33a7b666f194613aa704c0b645e6a50 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T01:28:02Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-b33a7b666f194613aa704c0b645e6a502023-11-23T13:48:40ZengMDPI AGNanomaterials2079-49912022-08-011217296910.3390/nano12172969Synthesis of CdSe and CdSe/ZnS Quantum Dots with Tunable Crystal Structure and Photoluminescent PropertiesJingling Li0Haixin Zheng1Ziming Zheng2Haibo Rong3Zhidong Zeng4Hui Zeng5School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, ChinaSchool of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, ChinaSchool of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, ChinaSchool of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, ChinaSchool of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, ChinaSchool of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, ChinaMastery over the structure of nanocrystals is a powerful tool for the control of their fluorescence properties and to broaden the range of their applications. In this work, the crystalline structure of CdSe can be tuned by the precursor concentration and the dosage of tributyl phosphine, which is verified by XRD, photoluminescence and UV-vis spectra, TEM observations, and time-correlated single photon counting (TCSPC) technology. Using a TBP-assisted thermal-cycling technique coupled with the single precursor method, core–shell QDs with different shell thicknesses were then prepared. The addition of TBP improves the isotropic growth of the shell, resulting in a high QY value, up to 91.4%, and a single-channel decay characteristic of CdSe/ZnS quantum dots. This work not only provides a facile synthesis route to precisely control the core–shell structures and fluorescence properties of CdSe nanocrystals but also builds a link between ligand chemistry and crystal growth theory.https://www.mdpi.com/2079-4991/12/17/2969quantum dotCdSecrystal structure controlphotoluminescence |
| spellingShingle | Jingling Li Haixin Zheng Ziming Zheng Haibo Rong Zhidong Zeng Hui Zeng Synthesis of CdSe and CdSe/ZnS Quantum Dots with Tunable Crystal Structure and Photoluminescent Properties Nanomaterials quantum dot CdSe crystal structure control photoluminescence |
| title | Synthesis of CdSe and CdSe/ZnS Quantum Dots with Tunable Crystal Structure and Photoluminescent Properties |
| title_full | Synthesis of CdSe and CdSe/ZnS Quantum Dots with Tunable Crystal Structure and Photoluminescent Properties |
| title_fullStr | Synthesis of CdSe and CdSe/ZnS Quantum Dots with Tunable Crystal Structure and Photoluminescent Properties |
| title_full_unstemmed | Synthesis of CdSe and CdSe/ZnS Quantum Dots with Tunable Crystal Structure and Photoluminescent Properties |
| title_short | Synthesis of CdSe and CdSe/ZnS Quantum Dots with Tunable Crystal Structure and Photoluminescent Properties |
| title_sort | synthesis of cdse and cdse zns quantum dots with tunable crystal structure and photoluminescent properties |
| topic | quantum dot CdSe crystal structure control photoluminescence |
| url | https://www.mdpi.com/2079-4991/12/17/2969 |
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