Details
Original language | English |
---|---|
Pages (from-to) | 4604-4614 |
Number of pages | 11 |
Journal | Nanoscale Advances |
Volume | 2 |
Issue number | 10 |
Early online date | 17 Sept 2020 |
Publication status | Published - 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
ASJC Scopus subject areas
- Chemical Engineering(all)
- Bioengineering
- Chemistry(all)
- General Chemistry
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Materials Science(all)
- General Materials Science
- Engineering(all)
- General Engineering
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In: Nanoscale Advances, Vol. 2, No. 10, 01.10.2020, p. 4604-4614.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - CdS crown growth on CdSe nanoplatelets
T2 - Core shape matters
AU - Schlosser, Anja
AU - Graf, Rebecca T.
AU - Bigall, Nadja C.
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.
PY - 2020/10/1
Y1 - 2020/10/1
N2 - 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
AB - 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
UR - http://www.scopus.com/inward/record.url?scp=85094842962&partnerID=8YFLogxK
U2 - 10.1039/d0na00619j
DO - 10.1039/d0na00619j
M3 - Article
AN - SCOPUS:85094842962
VL - 2
SP - 4604
EP - 4614
JO - Nanoscale Advances
JF - Nanoscale Advances
IS - 10
ER -