Journal article 656 views 88 downloads
Colloidal Manganese-Doped ZnS Nanoplatelets and Their Optical Properties
Liwei Dai,
Christian Strelow,
Tobias Kipp,
Alf Mews,
Iris Benkenstein,
Dirk Eifler,
Thanh Huyen Vuong,
Jabor Rabeah,
James McGettrick 
,
Rostyslav Lesyuk,
Christian Klinke
,
Rostyslav Lesyuk,
Christian Klinke
Chemistry of Materials, Volume: 33, Issue: 1, Pages: 275 - 284
Swansea University Authors:
James McGettrick , Christian Klinke
-
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DOI (Published version): 10.1021/acs.chemmater.0c03755
Abstract
Manganese (Mn)-doped ZnS nanocrystals (NCs) have been extensively explored for optical applications with the advantages of low toxicity, large Stokes shifts, and enhanced thermal and environmental stability. Although numerous studies on Mn-doped ZnS dots, rods, and wires have been reported, the lite...
| Published in: | Chemistry of Materials |
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| ISSN: | 0897-4756 1520-5002 |
| Published: |
American Chemical Society (ACS)
2021
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa56729 |
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| Abstract: |
Manganese (Mn)-doped ZnS nanocrystals (NCs) have been extensively explored for optical applications with the advantages of low toxicity, large Stokes shifts, and enhanced thermal and environmental stability. Although numerous studies on Mn-doped ZnS dots, rods, and wires have been reported, the literature related to Mn-doped ZnS nanoplatelets (ZnS:Mn NPLs) is scarce. Here, we present the first example of direct doping of Mn2+ ions into ZnS NPLs via the nucleation-doping strategy. The resulting ZnS:Mn NPLs exhibit Mn luminescence, indicative for successful doping of the host ZnS NPLs with Mn2+ ions. The energy transfer from the ZnS NPLs to the Mn2+ ions was observed by employing spectroscopic methods. Furthermore, the impact of the Mn concentration on the optical properties of ZnS:Mn NPLs was systematically investigated. As a result of Mn–Mn interaction, tunable Mn emission and shortened photoluminescence (PL) lifetime decay were observed and rationalized by means of electron paramagnetic resonance (EPR) and X-ray photoelectron spectroscopy (XPS). Finally, we show that the initially low dopant PL quantum yield (QY) of ZnS:Mn NPLs can be dramatically enhanced by passivating the surface trap states of the samples. The presented synthetic strategy of ZnS:Mn NPLs opens a new way to synthesize further doped systems of two-dimensional (2D) NPLs. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
1 |
| Start Page: |
275 |
| End Page: |
284 |