CdS crown growth on CdSe nanoplatelets: Core shape matters

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Original languageEnglish
Pages (from-to)4604-4614
Number of pages11
JournalNanoscale Advances
Volume2
Issue number10
Early online date17 Sept 2020
Publication statusPublished - 1 Oct 2020

Abstract

Cadmium chalcogenide nanoplatelets (NPLs) have gained tremendous attention in the past decade due to their extremely narrow optical features and their special electronic properties. For the application of the NPLs as optical emitters, in (photo) catalysis or sensing, further modification of the pristine (core) NPLs can be required. Therefore, many procedures for the synthesis of crowns (lateral extension of the core NPLs), shells and particle domains on the NPLs have already been developed. CdSe/CdS core/crown NPLs are characterised by extremely short photoluminescence (PL) lifetimes and high PL quantum yields (PLQYs) and might therefore be ideal candidates for lighting applications. In this work, we show how the optical properties of CdSe/CdS core/crown NPLs, especially their PLQYs, can be strongly improved by applying a sulphur precursor with a low reactivity. Under optimised conditions, the new procedure allows the growth of uniform CdS crowns around CdSe core NPLs with various lateral sizes, thicknesses and shapes. In addition, the modified growth kinetics was investigated by various methods, including UV/vis and PL spectroscopy as well as transmission electron microscopy. This journal is

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CdS crown growth on CdSe nanoplatelets: Core shape matters. / Schlosser, Anja; Graf, Rebecca T.; Bigall, Nadja C.
In: Nanoscale Advances, Vol. 2, No. 10, 01.10.2020, p. 4604-4614.

Research output: Contribution to journalArticleResearchpeer review

Schlosser, A, Graf, RT & Bigall, NC 2020, 'CdS crown growth on CdSe nanoplatelets: Core shape matters', Nanoscale Advances, vol. 2, no. 10, pp. 4604-4614. https://doi.org/10.1039/d0na00619j
Schlosser, A., Graf, R. T., & Bigall, N. C. (2020). CdS crown growth on CdSe nanoplatelets: Core shape matters. Nanoscale Advances, 2(10), 4604-4614. https://doi.org/10.1039/d0na00619j
Schlosser A, Graf RT, Bigall NC. CdS crown growth on CdSe nanoplatelets: Core shape matters. Nanoscale Advances. 2020 Oct 1;2(10):4604-4614. Epub 2020 Sept 17. doi: 10.1039/d0na00619j
Schlosser, Anja ; Graf, Rebecca T. ; Bigall, Nadja C. / CdS crown growth on CdSe nanoplatelets : Core shape matters. In: Nanoscale Advances. 2020 ; Vol. 2, No. 10. pp. 4604-4614.
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title = "CdS crown growth on CdSe nanoplatelets: Core shape matters",
abstract = "Cadmium chalcogenide nanoplatelets (NPLs) have gained tremendous attention in the past decade due to their extremely narrow optical features and their special electronic properties. For the application of the NPLs as optical emitters, in (photo) catalysis or sensing, further modification of the pristine (core) NPLs can be required. Therefore, many procedures for the synthesis of crowns (lateral extension of the core NPLs), shells and particle domains on the NPLs have already been developed. CdSe/CdS core/crown NPLs are characterised by extremely short photoluminescence (PL) lifetimes and high PL quantum yields (PLQYs) and might therefore be ideal candidates for lighting applications. In this work, we show how the optical properties of CdSe/CdS core/crown NPLs, especially their PLQYs, can be strongly improved by applying a sulphur precursor with a low reactivity. Under optimised conditions, the new procedure allows the growth of uniform CdS crowns around CdSe core NPLs with various lateral sizes, thicknesses and shapes. In addition, the modified growth kinetics was investigated by various methods, including UV/vis and PL spectroscopy as well as transmission electron microscopy. This journal is ",
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note = "Funding Information: The authors are grateful for financial support from the German Federal Ministry of Education and Research (BMBF) within the framework of the program NanoMatFutur, support code 03X5525. In addition, the project leading to these results has in part received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No. 714429). Furthermore, the project has in parts been funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, project ID 390833453). N. C. B. moreover acknowledges the DFG (grant agreement BI 1708/4-1) for funding. A. S. and R. T. G. would like to thank the Hannover School for Nanotechnology (HSN) for financial support. The authors would moreover like to acknowledge Armin Feldhoff as well as J{\"u}rgen Caro for providing the XRD facilities.",
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N1 - Funding Information: The authors are grateful for financial support from the German Federal Ministry of Education and Research (BMBF) within the framework of the program NanoMatFutur, support code 03X5525. In addition, the project leading to these results has in part received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No. 714429). Furthermore, the project has in parts been funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, project ID 390833453). N. C. B. moreover acknowledges the DFG (grant agreement BI 1708/4-1) for funding. A. S. and R. T. G. would like to thank the Hannover School for Nanotechnology (HSN) for financial support. The authors would moreover like to acknowledge Armin Feldhoff as well as Jürgen Caro for providing the XRD facilities.

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