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Substitutional and surface Mn.sup.2+./sup. centers in cubic ZnS:Mn nanocrystals. A correlated EPR and photoluminescence study
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SYSNO ASEP 0363935 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Substitutional and surface Mn2+ centers in cubic ZnS:Mn nanocrystals. A correlated EPR and photoluminescence study Author(s) Stefan, M. (RO)
Nistor, S.V. (RO)
Ghica, D. (RO)
Mateescu, C.D. (RO)
Nikl, Martin (FZU-D) RID, ORCID, SAI
Kučerková, Romana (FZU-D) ORCIDSource Title Physical Review. B - ISSN 1098-0121
Roč. 83, č. 4 (2011), 045301/1-045301/11Number of pages 11 s. Language eng - English Country US - United States Keywords ZnS:Mn ; EPR ; luminescence ; decay kinetics Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects KAN300100802 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z10100521 - FZU-D (2005-2011) UT WOS 000286770600005 DOI 10.1103/PhysRevB.83.045301 Annotation The EPR, radioluminescence, and photoluminescence of cubic ZnS (cZnS) nanocrystals (NCs) with a narrow size distribution centered at 2 nm, doped with 0.1, 0.2, and 0.5 at.% Mn2+ ions were investigated. Besides the main lines from substitutional Mn2+ ions localized in the core of the NCs next to a stacking defect, the EPR spectra exhibited two broader hyperfine sextets, attributed to the so-called Mn(II) and Mn(III) surface centers, which could be separated by adequate thermal treatments. The contribution to the photoluminescence from the Mn2+ ions at various sites was further determined from the analysis of the steady-state and time-resolved photoluminescence data from cZnS:Mn NCs subjected to thermal treatments and from cZnS:Mn single crystals. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2012
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