Amine ligands control of the optical properties and the shape of thermally grown core/shell CuInS2/ZnS quantum dots
Identifieur interne : 000087 ( Hal/Corpus ); précédent : 000086; suivant : 000088Amine ligands control of the optical properties and the shape of thermally grown core/shell CuInS2/ZnS quantum dots
Auteurs : Martyna Michalska ; Aboulaich Abdelhay ; Ghouti Medjahdi ; Rachid Mahiou ; Stefan Jurga ; Raphaël SchneiderSource :
- Journal of Alloys and Compounds [ 0925-8388 ] ; 2015-05-09.
Abstract
A series of CuInZnxS2+x QDs has been successfully synthesized via a non-injection method by varying the amine (oleylamine, dioctylamine, dodecylamine, octadecylamine) during the ZnS shell introduction on the CuInS2 core. The effects of these amines on the photoluminescence (PL) and on the morphology of CuInZnxS2+x QDs were explored. The optical features and structure of the obtained CuInZnxS2+x QDs have been characterized by UV–visible and fluorescence spectroscopies, time resolved PL, HR-TEM, XRD and EDX. After the ZnS shell introduction at 220 °C, CuInZnxS2+x QDs showed greatly improved properties, the PL quantum yield can reach up to 70% using dioctylamine. The formation of CuInZnxS2+x QDs results in a blue shift of both the absorption and PL due to the formation of the alloyed interfacial layer at CuInS2/ZnS during the shell growth. By increasing the reaction temperature to 250 C (thermolysis of CuInZnxS2+x QDs), marked red-shifts in PL emissions accompanied by morphological changes of the nanocrystals were observed. The use of oleylamine generates 6.6 nm-sized pyramidally-shaped nanocrystals with a PL quantum yield of 22%.
Url:
DOI: 10.1016/j.jallcom.2015.04.162
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Hal:hal-01153726Le document en format XML
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<front><div type="abstract" xml:lang="en">A series of CuInZnxS2+x QDs has been successfully synthesized via a non-injection method by varying the amine (oleylamine, dioctylamine, dodecylamine, octadecylamine) during the ZnS shell introduction on the CuInS2 core. The effects of these amines on the photoluminescence (PL) and on the morphology of CuInZnxS2+x QDs were explored. The optical features and structure of the obtained CuInZnxS2+x QDs have been characterized by UV–visible and fluorescence spectroscopies, time resolved PL, HR-TEM, XRD and EDX. After the ZnS shell introduction at 220 °C, CuInZnxS2+x QDs showed greatly improved properties, the PL quantum yield can reach up to 70% using dioctylamine. The formation of CuInZnxS2+x QDs results in a blue shift of both the absorption and PL due to the formation of the alloyed interfacial layer at CuInS2/ZnS during the shell growth. By increasing the reaction temperature to 250 C (thermolysis of CuInZnxS2+x QDs), marked red-shifts in PL emissions accompanied by morphological changes of the nanocrystals were observed. The use of oleylamine generates 6.6 nm-sized pyramidally-shaped nanocrystals with a PL quantum yield of 22%.</div>
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<idno type="halRefHtml">Journal of Alloys and Compounds, Elsevier, 2015, 645, pp.184-192. <10.1016/j.jallcom.2015.04.162></idno>
<idno type="halRef">Journal of Alloys and Compounds, Elsevier, 2015, 645, pp.184-192. <10.1016/j.jallcom.2015.04.162></idno>
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<idno type="stamp" n="ICC" p="UNIV-BPCLERMONT">Institut de Chimie de Clermont-Ferrand</idno>
<idno type="stamp" n="UNIV-BPCLERMONT" p="PRES_CLERMONT">Université Blaise Pascal - Clermont-Ferrand II</idno>
<idno type="stamp" n="PRES_CLERMONT">Université de Clermont</idno>
<idno type="stamp" n="INC-CNRS">Institut de Chimie du CNRS</idno>
<idno type="stamp" n="IJL-UL">Institut Jean Lamour</idno>
<idno type="stamp" n="LRGP-UL">LRGP</idno>
<idno type="stamp" n="UNIV-LORRAINE">Université de Lorraine</idno>
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<sourceDesc><biblStruct><analytic><title xml:lang="en">Amine ligands control of the optical properties and the shape of thermally grown core/shell CuInS2/ZnS quantum dots</title>
<author role="aut"><persName><forename type="first">Martyna</forename>
<surname>Michalska</surname>
</persName>
<idno type="halAuthorId">1043579</idno>
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<author role="aut"><persName><forename type="first">Aboulaich</forename>
<surname>Abdelhay</surname>
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<idno type="halAuthorId">968299</idno>
<affiliation ref="#struct-179392"></affiliation>
</author>
<author role="aut"><persName><forename type="first">Ghouti</forename>
<surname>Medjahdi</surname>
</persName>
<idno type="halAuthorId">447888</idno>
<affiliation ref="#struct-104710"></affiliation>
</author>
<author role="aut"><persName><forename type="first">Rachid</forename>
<surname>Mahiou</surname>
</persName>
<idno type="halAuthorId">187964</idno>
<affiliation ref="#struct-179392"></affiliation>
</author>
<author role="aut"><persName><forename type="first">Stefan</forename>
<surname>Jurga</surname>
</persName>
<idno type="halAuthorId">1043580</idno>
</author>
<author role="aut"><persName><forename type="first">Raphaël</forename>
<surname>Schneider</surname>
</persName>
<email>raphael.schneider@univ-lorraine.fr</email>
<idno type="halAuthorId">813485</idno>
<affiliation ref="#struct-211875"></affiliation>
</author>
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<monogr><idno type="halJournalId" status="VALID">15055</idno>
<idno type="issn">0925-8388</idno>
<title level="j">Journal of Alloys and Compounds</title>
<imprint><publisher>Elsevier</publisher>
<biblScope unit="volume">645</biblScope>
<biblScope unit="pp">184-192</biblScope>
<date type="datePub">2015-05-09</date>
<date type="dateEpub">2015-05-09</date>
</imprint>
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<idno type="doi">10.1016/j.jallcom.2015.04.162</idno>
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<profileDesc><langUsage><language ident="en">English</language>
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<abstract xml:lang="en">A series of CuInZnxS2+x QDs has been successfully synthesized via a non-injection method by varying the amine (oleylamine, dioctylamine, dodecylamine, octadecylamine) during the ZnS shell introduction on the CuInS2 core. The effects of these amines on the photoluminescence (PL) and on the morphology of CuInZnxS2+x QDs were explored. The optical features and structure of the obtained CuInZnxS2+x QDs have been characterized by UV–visible and fluorescence spectroscopies, time resolved PL, HR-TEM, XRD and EDX. After the ZnS shell introduction at 220 °C, CuInZnxS2+x QDs showed greatly improved properties, the PL quantum yield can reach up to 70% using dioctylamine. The formation of CuInZnxS2+x QDs results in a blue shift of both the absorption and PL due to the formation of the alloyed interfacial layer at CuInS2/ZnS during the shell growth. By increasing the reaction temperature to 250 C (thermolysis of CuInZnxS2+x QDs), marked red-shifts in PL emissions accompanied by morphological changes of the nanocrystals were observed. The use of oleylamine generates 6.6 nm-sized pyramidally-shaped nanocrystals with a PL quantum yield of 22%.</abstract>
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