Academic Bibliography

 Search 200 years of publications by Ghent University researchers.
Advanced search
1 file | 4.72 MB
Add to list
  1. Search results
  2. Near-infrared Cu-In-Se-based colloida...

Near-infrared Cu-In-Se-based colloidal nanocrystals via cation exchange

Josephine FL Lox, Zhiya Dang, Volodymyr M Dzhagan, Daniel Spittel, Beatriz Martin-Garcia, Iwan Moreels (UGent) , Dietrich RT Zahn and Vladimir Lesnyak
(2018) CHEMISTRY OF MATERIALS. 30(8). p.2607-2617
Author
Organization
Abstract
We developed a three-step colloidal synthesis of near-infrared (NIR) active Cu-In-Se (CISe)-based nanocrystals (NCs) via a sequential partial cation exchange realized in one pot. In the first step, binary highly copper deficient Cu2-xSe NCs were synthesized, followed by a partial cation exchange of copper to indium ions, yielding CISe NCs. This reaction allows for a precise control of the composition of the resulting NCs through a simple variation of the ratio between guest-cation precursors and parent NCs. To enhance the stability and the photoluminescence (PL) properties of the NCs, a subsequent ZnS shell was grown in the third step, resulting in CISeS/ZnS core/shell particles. These core/shell hetero-NCs exhibited a dramatic increase in size and a restructuring to trigonal pyramidal shape. The shell growth performed at a relatively high temperature (250 degrees C) also led to anion exchange, in which sulfur replaced part of selenium atoms close to the surface of the NCs, forming alloyed CISeS core structure. This efficient anion exchange is rarely reported for I-III-VI-based nanomaterials. Furthermore, we demonstrated that at higher reaction temperature, it is possible to obtain In-rich CISeS/ZnS NCs whose emission was shifted to the visible region. Therefore, a careful tuning of the reaction parameters, such as the Cu:Se and Cu:In ratios, temperature, and time, enables a distinct control over the size and composition of the NCs while maintaining their crystal structure. By varying the size of the CISeS/ZnS NCs from 9 to 18 nm, the PL spectra could be tuned, covering a wide NIR range with maxima from 990 to 1210 nm. Thus, in these experiments, we demonstrated a clear dependence of the optical properties of these materials on their size and extended the PL range of CISe-based NCs further to the infrared part of the spectrum. The results obtained might be important not only to elucidation of fundamentals of ion exchange reactions but also may provide a general preparative approach to a wide variety of copper chalcogenide-based NCs with well-controlled size, shape, composition, and even crystal structure.
Keywords
CORE/SHELL QUANTUM DOTS, SOLAR-CELLS, OPTICAL-PROPERTIES, CUINSE2, NANOCRYSTALS, SEMICONDUCTOR NANOCRYSTALS, CHALCOGENIDE NANOCRYSTALS, PHOTOVOLTAIC PERFORMANCE, SELENIDE NANOCRYSTALS, CU2-XSE NANOCRYSTALS, HIGHLY LUMINESCENT

Downloads

  • Download
    (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 4.72 MB

Citation

Please use this url to cite or link to this publication:

MLA
Lox, Josephine FL, et al. “Near-Infrared Cu-In-Se-Based Colloidal Nanocrystals via Cation Exchange.” CHEMISTRY OF MATERIALS, vol. 30, no. 8, 2018, pp. 2607–17, doi:10.1021/acs.chemmater.7b05187.
APA
Lox, J. F., Dang, Z., Dzhagan, V. M., Spittel, D., Martin-Garcia, B., Moreels, I., … Lesnyak, V. (2018). Near-infrared Cu-In-Se-based colloidal nanocrystals via cation exchange. CHEMISTRY OF MATERIALS, 30(8), 2607–2617. https://doi.org/10.1021/acs.chemmater.7b05187
Chicago author-date
Lox, Josephine FL, Zhiya Dang, Volodymyr M Dzhagan, Daniel Spittel, Beatriz Martin-Garcia, Iwan Moreels, Dietrich RT Zahn, and Vladimir Lesnyak. 2018. “Near-Infrared Cu-In-Se-Based Colloidal Nanocrystals via Cation Exchange.” CHEMISTRY OF MATERIALS 30 (8): 2607–17. https://doi.org/10.1021/acs.chemmater.7b05187.
Chicago author-date (all authors)
Lox, Josephine FL, Zhiya Dang, Volodymyr M Dzhagan, Daniel Spittel, Beatriz Martin-Garcia, Iwan Moreels, Dietrich RT Zahn, and Vladimir Lesnyak. 2018. “Near-Infrared Cu-In-Se-Based Colloidal Nanocrystals via Cation Exchange.” CHEMISTRY OF MATERIALS 30 (8): 2607–2617. doi:10.1021/acs.chemmater.7b05187.
Vancouver
1.
Lox JF, Dang Z, Dzhagan VM, Spittel D, Martin-Garcia B, Moreels I, et al. Near-infrared Cu-In-Se-based colloidal nanocrystals via cation exchange. CHEMISTRY OF MATERIALS. 2018;30(8):2607–17.
IEEE
[1]
J. F. Lox et al., “Near-infrared Cu-In-Se-based colloidal nanocrystals via cation exchange,” CHEMISTRY OF MATERIALS, vol. 30, no. 8, pp. 2607–2617, 2018.
@article{8589968,
  abstract     = {{We developed a three-step colloidal synthesis of near-infrared (NIR) active Cu-In-Se (CISe)-based nanocrystals (NCs) via a sequential partial cation exchange realized in one pot. In the first step, binary highly copper deficient Cu2-xSe NCs were synthesized, followed by a partial cation exchange of copper to indium ions, yielding CISe NCs. This reaction allows for a precise control of the composition of the resulting NCs through a simple variation of the ratio between guest-cation precursors and parent NCs. To enhance the stability and the photoluminescence (PL) properties of the NCs, a subsequent ZnS shell was grown in the third step, resulting in CISeS/ZnS core/shell particles. These core/shell hetero-NCs exhibited a dramatic increase in size and a restructuring to trigonal pyramidal shape. The shell growth performed at a relatively high temperature (250 degrees C) also led to anion exchange, in which sulfur replaced part of selenium atoms close to the surface of the NCs, forming alloyed CISeS core structure. This efficient anion exchange is rarely reported for I-III-VI-based nanomaterials. Furthermore, we demonstrated that at higher reaction temperature, it is possible to obtain In-rich CISeS/ZnS NCs whose emission was shifted to the visible region. Therefore, a careful tuning of the reaction parameters, such as the Cu:Se and Cu:In ratios, temperature, and time, enables a distinct control over the size and composition of the NCs while maintaining their crystal structure. By varying the size of the CISeS/ZnS NCs from 9 to 18 nm, the PL spectra could be tuned, covering a wide NIR range with maxima from 990 to 1210 nm. Thus, in these experiments, we demonstrated a clear dependence of the optical properties of these materials on their size and extended the PL range of CISe-based NCs further to the infrared part of the spectrum. The results obtained might be important not only to elucidation of fundamentals of ion exchange reactions but also may provide a general preparative approach to a wide variety of copper chalcogenide-based NCs with well-controlled size, shape, composition, and even crystal structure.}},
  author       = {{Lox, Josephine FL and Dang, Zhiya and Dzhagan, Volodymyr M and Spittel, Daniel and Martin-Garcia, Beatriz and Moreels, Iwan and Zahn, Dietrich RT and Lesnyak, Vladimir}},
  issn         = {{0897-4756}},
  journal      = {{CHEMISTRY OF MATERIALS}},
  keywords     = {{CORE/SHELL QUANTUM DOTS,SOLAR-CELLS,OPTICAL-PROPERTIES,CUINSE2,NANOCRYSTALS,SEMICONDUCTOR NANOCRYSTALS,CHALCOGENIDE NANOCRYSTALS,PHOTOVOLTAIC PERFORMANCE,SELENIDE NANOCRYSTALS,CU2-XSE NANOCRYSTALS,HIGHLY LUMINESCENT}},
  language     = {{eng}},
  number       = {{8}},
  pages        = {{2607--2617}},
  title        = {{Near-infrared Cu-In-Se-based colloidal nanocrystals via cation exchange}},
  url          = {{http://doi.org/10.1021/acs.chemmater.7b05187}},
  volume       = {{30}},
  year         = {{2018}},
}
Altmetric
View in Altmetric
Web of Science
Times cited: