Aqueous route to color-tunable Mn-doped ZnS quantum dots
Identifieur interne : 000583 ( Main/Exploration ); précédent : 000582; suivant : 000584Aqueous route to color-tunable Mn-doped ZnS quantum dots
Auteurs : Houcine Labiadh [Tunisie] ; Tahar Ben Chaabane [Tunisie] ; David Piatkowski [Pologne] ; Sebastian Mackowski [Pologne] ; Jacques Lalevéee [France] ; Jaafar Ghanbaja [France] ; Fadi Aldeek [France] ; Raphaël Schneider [France]Source :
- Materials Chemistry and Physics [ 0254-0584 ] ; 2013-04-01.
English descriptors
Abstract
Mn-doped zinc sulfide (Mn:ZnS) quantum dots stabilized by 3-mercaptopropionic acid (MPA) were synthesized at 100°C in basic aqueous solution using the nucleation-doping strategy. The optical properties and structure of the obtained Mn:ZnS d-dots have been characterized by UV-vis, photoluminescence (PL) and time-resolved PL spectroscopies, transmission electron microscopy (TEM), X-ray diffraction (XRD), and electron spin resonance (ESR). The obtained nearly monodisperse Mn:ZnS@MPA QDs were found to be of spherical shape with an average diameter of ca. 2.5 nm and with a zinc-blende crystal structure. By varying the base (LiOH, NaOH, KOH, CsOH) used to deprotonate the MPA ligand and adjust the pH of the aqueous solution to 11, the PL emission wavelengths can be tuned within a relatively large optical window, from 567 to 594 nm. The variations of charge density near the surface of the QDs obtained by changing the cation associated to the MPA ligand and of the dopant location in the ZnS host are at the origin of the PL shifts observed. In order to improve the PL emission efficiency, a ZnS shell was subsequently overcoated around the Mn:ZnS core nanocrystals. With ZnS shell growth, the PL emission wavelength was restricted between 570 and 583 nm but PL quantum efficiency of Mn:ZnS/ZnS core/shell nanocrystals increased up to 18.4 %.
Url:
DOI: 10.1016/j.matchemphys.2013.04.023
Affiliations:
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ENSIC, 1 rue de Grandville BP 20451, 54001 Nancy Cedex</addrLine><country key="FR"></country></address><ref type="url">http://lrgp.univ-lorraine.fr/</ref></desc><listRelation><relation active="#struct-413289" type="direct"></relation><relation name="UMR7274" active="#struct-441569" type="direct"></relation></listRelation><tutelles><tutelle active="#struct-413289" type="direct"><org type="institution" xml:id="struct-413289" status="VALID"><idno type="IdRef">157040569</idno><idno type="IdUnivLorraine">[UL]100--</idno><orgName>Université de Lorraine</orgName><orgName type="acronym">UL</orgName><date type="start">2012-01-01</date><desc><address><addrLine>34 cours Léopold - CS 25233 - 54052 Nancy cedex</addrLine><country key="FR"></country></address><ref type="url">http://www.univ-lorraine.fr/</ref></desc></org></tutelle><tutelle name="UMR7274" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Nancy</settlement><settlement type="city">Metz</settlement><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Lorraine (région)</region></placeName><orgName type="university">Université de Lorraine</orgName></affiliation></author><author><name sortKey="Schneider, Raphael" sort="Schneider, Raphael" uniqKey="Schneider R" first="Raphaël" last="Schneider">Raphaël Schneider</name><affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-211875" status="VALID"><idno type="IdRef">153068876</idno><idno type="RNSR">201320573K</idno><idno type="IdUnivLorraine">[UL]RQC--</idno><orgName>Laboratoire Réactions et Génie des Procédés</orgName><orgName type="acronym">LRGP</orgName><date type="start">2013-01-01</date><desc><address><addrLine>Université de Lorraine - ENSIC, 1 rue de Grandville BP 20451, 54001 Nancy Cedex</addrLine><country key="FR"></country></address><ref type="url">http://lrgp.univ-lorraine.fr/</ref></desc><listRelation><relation active="#struct-413289" type="direct"></relation><relation name="UMR7274" active="#struct-441569" type="direct"></relation></listRelation><tutelles><tutelle active="#struct-413289" type="direct"><org type="institution" xml:id="struct-413289" status="VALID"><idno type="IdRef">157040569</idno><idno type="IdUnivLorraine">[UL]100--</idno><orgName>Université de Lorraine</orgName><orgName type="acronym">UL</orgName><date type="start">2012-01-01</date><desc><address><addrLine>34 cours Léopold - CS 25233 - 54052 Nancy cedex</addrLine><country key="FR"></country></address><ref type="url">http://www.univ-lorraine.fr/</ref></desc></org></tutelle><tutelle name="UMR7274" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Nancy</settlement><settlement type="city">Metz</settlement><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Lorraine (région)</region></placeName><orgName type="university">Université de Lorraine</orgName></affiliation></author></analytic><idno type="DOI">10.1016/j.matchemphys.2013.04.023</idno><series><title level="j">Materials Chemistry and Physics</title><idno type="ISSN">0254-0584</idno><imprint><date type="datePub">2013-04-01</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="mix" xml:lang="en"><term>Chemical synthesis</term><term>Luminescence</term><term>Nanostructures</term><term>Optical properties</term><term>Semiconductors</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Mn-doped zinc sulfide (Mn:ZnS) quantum dots stabilized by 3-mercaptopropionic acid (MPA) were synthesized at 100°C in basic aqueous solution using the nucleation-doping strategy. The optical properties and structure of the obtained Mn:ZnS d-dots have been characterized by UV-vis, photoluminescence (PL) and time-resolved PL spectroscopies, transmission electron microscopy (TEM), X-ray diffraction (XRD), and electron spin resonance (ESR). The obtained nearly monodisperse Mn:ZnS@MPA QDs were found to be of spherical shape with an average diameter of ca. 2.5 nm and with a zinc-blende crystal structure. By varying the base (LiOH, NaOH, KOH, CsOH) used to deprotonate the MPA ligand and adjust the pH of the aqueous solution to 11, the PL emission wavelengths can be tuned within a relatively large optical window, from 567 to 594 nm. The variations of charge density near the surface of the QDs obtained by changing the cation associated to the MPA ligand and of the dopant location in the ZnS host are at the origin of the PL shifts observed. In order to improve the PL emission efficiency, a ZnS shell was subsequently overcoated around the Mn:ZnS core nanocrystals. With ZnS shell growth, the PL emission wavelength was restricted between 570 and 583 nm but PL quantum efficiency of Mn:ZnS/ZnS core/shell nanocrystals increased up to 18.4 %.</div></front></TEI><affiliations><list><country><li>France</li><li>Pologne</li><li>Tunisie</li></country><region><li>Grand Est</li><li>Lorraine (région)</li></region><settlement><li>Metz</li><li>Nancy</li></settlement><orgName><li>Université de Lorraine</li></orgName></list><tree><country name="Tunisie"><noRegion><name sortKey="Labiadh, Houcine" sort="Labiadh, Houcine" uniqKey="Labiadh H" first="Houcine" last="Labiadh">Houcine Labiadh</name></noRegion><name sortKey="Ben Chaabane, Tahar" sort="Ben Chaabane, Tahar" uniqKey="Ben Chaabane T" first="Tahar" last="Ben Chaabane">Tahar Ben Chaabane</name></country><country name="Pologne"><noRegion><name sortKey="Piatkowski, David" sort="Piatkowski, David" uniqKey="Piatkowski D" first="David" last="Piatkowski">David Piatkowski</name></noRegion><name sortKey="Mackowski, Sebastian" sort="Mackowski, Sebastian" uniqKey="Mackowski S" first="Sebastian" last="Mackowski">Sebastian Mackowski</name></country><country name="France"><noRegion><name sortKey="Laleveee, Jacques" sort="Laleveee, Jacques" uniqKey="Laleveee J" first="Jacques" last="Lalevéee">Jacques Lalevéee</name></noRegion><name sortKey="Aldeek, Fadi" sort="Aldeek, Fadi" uniqKey="Aldeek F" first="Fadi" last="Aldeek">Fadi Aldeek</name><name sortKey="Ghanbaja, Jaafar" sort="Ghanbaja, Jaafar" uniqKey="Ghanbaja J" first="Jaafar" last="Ghanbaja">Jaafar Ghanbaja</name><name sortKey="Schneider, Raphael" sort="Schneider, Raphael" uniqKey="Schneider R" first="Raphaël" last="Schneider">Raphaël Schneider</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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