Fabrication of GaAs, InxGa1-xAs and Their ZnSe Core/Shell Colloidal Quantum Dots

Joong Pill Park; Jae joon Lee; Sang Wook Kim

doi:10.1021/jacs.6b08679

Fabrication of GaAs, In_xGa_1-xAs and Their ZnSe Core/Shell Colloidal Quantum Dots

Joong Pill Park, Jae joon Lee, Sang Wook Kim

Department of Energy and Materials Engineering

Ajou University

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

We first report the GaAs/ZnSe and In_xGa_1-xAs/ZnSe core/shell structured colloidal quantum dots (CQDs). GaAs based CQD, which are hard to obtain by the chemical synthetic method, can be prepared successfully using the acetylacetonate complex of indium and gallium as cationic precursors. We control the indium contents, and the photoluminescence emission is tuned from orange to deep red. In_0.2Ga_0.8As/ZnSe core/shell QDs show the best quantum yield of 25.6%. A ZnSe outer shell protects the core and improves quantum yield, and it shows a large red shift owing to the quasi-type-I band structure.

Original language	English
Pages (from-to)	16568-16571
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	138
Issue number	51
DOIs	https://doi.org/10.1021/jacs.6b08679
State	Published - 28 Dec 2016

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title = "Fabrication of GaAs, InxGa1-xAs and Their ZnSe Core/Shell Colloidal Quantum Dots",

abstract = "We first report the GaAs/ZnSe and InxGa1-xAs/ZnSe core/shell structured colloidal quantum dots (CQDs). GaAs based CQD, which are hard to obtain by the chemical synthetic method, can be prepared successfully using the acetylacetonate complex of indium and gallium as cationic precursors. We control the indium contents, and the photoluminescence emission is tuned from orange to deep red. In0.2Ga0.8As/ZnSe core/shell QDs show the best quantum yield of 25.6%. A ZnSe outer shell protects the core and improves quantum yield, and it shows a large red shift owing to the quasi-type-I band structure.",

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AU - Lee, Jae joon

AU - Kim, Sang Wook

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Y1 - 2016/12/28

N2 - We first report the GaAs/ZnSe and InxGa1-xAs/ZnSe core/shell structured colloidal quantum dots (CQDs). GaAs based CQD, which are hard to obtain by the chemical synthetic method, can be prepared successfully using the acetylacetonate complex of indium and gallium as cationic precursors. We control the indium contents, and the photoluminescence emission is tuned from orange to deep red. In0.2Ga0.8As/ZnSe core/shell QDs show the best quantum yield of 25.6%. A ZnSe outer shell protects the core and improves quantum yield, and it shows a large red shift owing to the quasi-type-I band structure.

AB - We first report the GaAs/ZnSe and InxGa1-xAs/ZnSe core/shell structured colloidal quantum dots (CQDs). GaAs based CQD, which are hard to obtain by the chemical synthetic method, can be prepared successfully using the acetylacetonate complex of indium and gallium as cationic precursors. We control the indium contents, and the photoluminescence emission is tuned from orange to deep red. In0.2Ga0.8As/ZnSe core/shell QDs show the best quantum yield of 25.6%. A ZnSe outer shell protects the core and improves quantum yield, and it shows a large red shift owing to the quasi-type-I band structure.

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Fabrication of GaAs, In_xGa_1-xAs and Their ZnSe Core/Shell Colloidal Quantum Dots

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