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Title
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Manganese-doping-induced quantum confinement within host perovskite nanocrystals through Ruddlesden-Popper defects
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Author
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Abstract
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| The concept of doping Mn2+ ions into II-VI semiconductor nanocrystals (NCs) was recently extended to perovskite NCs. To date, most studies on Mn2+ doped NCs focus on enhancing the emission related to the Mn2+ dopant via an energy transfer mechanism. Herein, we found that the doping of Mn2+ ions into CsPbCl3 NCs not only results in a Mn2+-related orange emission, but also strongly influences the excitonic properties of the host NCs. We observe for the first time that Mn2+ doping leads to the formation of RuddlesdenPopper (R.P.) defects and thus induces quantum confinement within the host NCs. We find that a slight doping with Mn2+ ions improves the size distribution of the NCs, which results in a prominent excitonic peak. However, with increasing the Mn2+ concentration, the number of R.P. planes increases leading to smaller single-crystal domains. The thus enhanced confinement and crystal inhomogeneity cause a gradual blue shift and broadening of the excitonic transition, respectively. |
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Language
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English
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Source (journal)
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Angewandte Chemie: international edition in English. - Weinheim
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Publication
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Weinheim
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2020
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ISSN
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1433-7851
0570-0833
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DOI
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10.1002/ANIE.201914473
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Volume/pages
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59
:17
(2020)
, p. 6794-6799
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ISI
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000525279800024
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Pubmed ID
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32003102
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Full text (Publisher's DOI)
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Full text (open access)
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