Interfacial oxidation and photoluminescence of InP-based core/shell quantum dots
- Author
- Mickaël Tessier (UGent) , Edwin A Baquero, Dorian Dupont (UGent) , Valeriia Grigel (UGent) , Eva Bladt, Sara Bals, Yannick Coppel, Zeger Hens (UGent) , Céline Nayral and Fabien Delpech
- Organization
- Abstract
- Indium phosphide colloidal quantum dots (QDs) are emerging as an efficient cadmium-free alternative for optoelectronic applications. Recently, syntheses based on easy-to-implement aminophosphine precursors have been developed. We show by solid-state nuclear magnetic resonance spectroscopy that this new approach allows oxide-free indium phosphide core or core/shell quantum dots to be made. Importantly, the oxide-free core/shell interface does not help in achieving higher luminescence efficiencies. We demonstrate that in the case of InP/ZnS and InP/ZnSe QDs, a more pronounced oxidation concurs with a higher photoluminescence efficiency. This study suggests that a II-VI shell on a III-V core generates an interface prone to defects. The most efficient InP/ZnS or InP/ZnSe QDs are therefore made with an oxide buffer layer between the core and the shell: it passivates these interface defects but also results in a somewhat broader emission line width.
- Keywords
- COLLOIDAL NANOCRYSTALS, HIGHLY LUMINESCENT, INP/ZNS NANOCRYSTALS, SURFACE, NMR, CHEMISTRY, HETEROSTRUCTURES, TRAPS
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-8637754
- MLA
- Tessier, Mickaël, et al. “Interfacial Oxidation and Photoluminescence of InP-Based Core/Shell Quantum Dots.” CHEMISTRY OF MATERIALS, vol. 30, no. 19, 2018, pp. 6877–83, doi:10.1021/acs.chemmater.8b03117.
- APA
- Tessier, M., Baquero, E. A., Dupont, D., Grigel, V., Bladt, E., Bals, S., … Delpech, F. (2018). Interfacial oxidation and photoluminescence of InP-based core/shell quantum dots. CHEMISTRY OF MATERIALS, 30(19), 6877–6883. https://doi.org/10.1021/acs.chemmater.8b03117
- Chicago author-date
- Tessier, Mickaël, Edwin A Baquero, Dorian Dupont, Valeriia Grigel, Eva Bladt, Sara Bals, Yannick Coppel, Zeger Hens, Céline Nayral, and Fabien Delpech. 2018. “Interfacial Oxidation and Photoluminescence of InP-Based Core/Shell Quantum Dots.” CHEMISTRY OF MATERIALS 30 (19): 6877–83. https://doi.org/10.1021/acs.chemmater.8b03117.
- Chicago author-date (all authors)
- Tessier, Mickaël, Edwin A Baquero, Dorian Dupont, Valeriia Grigel, Eva Bladt, Sara Bals, Yannick Coppel, Zeger Hens, Céline Nayral, and Fabien Delpech. 2018. “Interfacial Oxidation and Photoluminescence of InP-Based Core/Shell Quantum Dots.” CHEMISTRY OF MATERIALS 30 (19): 6877–6883. doi:10.1021/acs.chemmater.8b03117.
- Vancouver
- 1.Tessier M, Baquero EA, Dupont D, Grigel V, Bladt E, Bals S, et al. Interfacial oxidation and photoluminescence of InP-based core/shell quantum dots. CHEMISTRY OF MATERIALS. 2018;30(19):6877–83.
- IEEE
- [1]M. Tessier et al., “Interfacial oxidation and photoluminescence of InP-based core/shell quantum dots,” CHEMISTRY OF MATERIALS, vol. 30, no. 19, pp. 6877–6883, 2018.
@article{8637754,
abstract = {{Indium phosphide colloidal quantum dots (QDs) are emerging as an efficient cadmium-free alternative for optoelectronic applications. Recently, syntheses based on easy-to-implement aminophosphine precursors have been developed. We show by solid-state nuclear magnetic resonance spectroscopy that this new approach allows oxide-free indium phosphide core or core/shell quantum dots to be made. Importantly, the oxide-free core/shell interface does not help in achieving higher luminescence efficiencies. We demonstrate that in the case of InP/ZnS and InP/ZnSe QDs, a more pronounced oxidation concurs with a higher photoluminescence efficiency. This study suggests that a II-VI shell on a III-V core generates an interface prone to defects. The most efficient InP/ZnS or InP/ZnSe QDs are therefore made with an oxide buffer layer between the core and the shell: it passivates these interface defects but also results in a somewhat broader emission line width.}},
author = {{Tessier, Mickaël and Baquero, Edwin A and Dupont, Dorian and Grigel, Valeriia and Bladt, Eva and Bals, Sara and Coppel, Yannick and Hens, Zeger and Nayral, Céline and Delpech, Fabien}},
issn = {{0897-4756}},
journal = {{CHEMISTRY OF MATERIALS}},
keywords = {{COLLOIDAL NANOCRYSTALS,HIGHLY LUMINESCENT,INP/ZNS NANOCRYSTALS,SURFACE,NMR,CHEMISTRY,HETEROSTRUCTURES,TRAPS}},
language = {{eng}},
number = {{19}},
pages = {{6877--6883}},
title = {{Interfacial oxidation and photoluminescence of InP-based core/shell quantum dots}},
url = {{http://doi.org/10.1021/acs.chemmater.8b03117}},
volume = {{30}},
year = {{2018}},
}
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