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Ultranarrow and Widely Tunable Mn2+-Induced Photoluminescence from Single Mn-Doped Nanocrystals of ZnS-CdS Alloys
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2013 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 110, no 26, 267401- p.Article in journal (Refereed) Published
Abstract [en]

Extensively studied Mn-doped semiconductor nanocrystals have invariably exhibited photoluminescence over a narrow energy window of width <= 150 meV in the orange-red region and a surprisingly large spectral width (>= 180 meV), contrary to its presumed atomic-like origin. Carrying out emission measurements on individual single nanocrystals and supported by ab initio calculations, we show that Mn PL emission, in fact, can (i) vary over a much wider range (similar to 370 meV) covering the deep green-deep red region and (ii) exhibit widths substantially lower (similar to 60-75 meV) than reported so far, opening newer application possibilities and requiring a fundamental shift in our perception of the emission from Mn-doped semiconductor nanocrystals.

Place, publisher, year, edition, pages
2013. Vol. 110, no 26, 267401- p.
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Natural Sciences
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URN: urn:nbn:se:uu:diva-205008DOI: 10.1103/PhysRevLett.110.267401ISI: 000321098200020OAI: oai:DiVA.org:uu-205008DiVA: diva2:640506
Available from: 2013-08-13 Created: 2013-08-13 Last updated: 2017-12-06Bibliographically approved

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Sarma, Dipankar Das

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