Synthesis and characterization of composition-gradient based CdxZn1-xSeyS1-y heterostructured quantum dots

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2 Citations (Scopus)

Abstract

In this paper, we describe a one-pot synthesis method to produce CdxZn1-xSeyS1-y heterostructured quantum dots (QDs) with chemical composition gradient. The synthesized QDs have either CdSe rich cores with ZnS rich shell or CdSe-CdS hybrid cores with ZnS rich shell, which are formed simply due to the differences in reactivities of the precursors. The obtained QDs were characterized using TEM, PL spectroscopy, UV-Vis, XRD and EDX. The heterostructured QDs emit brightly in the 478-603 nm spectral window and the emission wavelength is tunable by changing the crystal size and the precursor ratios. The photoluminescent emission peaks are narrow (FWHM ∼ 35 nm) due to the good size and shape uniformity of the particles.

Original languageEnglish
Pages (from-to)129-141
Number of pages13
JournalReaction Kinetics, Mechanisms and Catalysis
Volume115
Issue number1
DOIs
Publication statusPublished - Nov 27 2014

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Semiconductor quantum dots
quantum dots
gradients
synthesis
Chemical analysis
Full width at half maximum
Ultraviolet spectroscopy
Energy dispersive spectroscopy
chemical composition
reactivity
Transmission electron microscopy
Wavelength
transmission electron microscopy
Crystals
wavelengths
spectroscopy
crystals

Keywords

  • Alloy
  • CdZnSeS
  • Core-shell
  • Quantum dot
  • Single-step synthesis

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

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title = "Synthesis and characterization of composition-gradient based CdxZn1-xSeyS1-y heterostructured quantum dots",
abstract = "In this paper, we describe a one-pot synthesis method to produce CdxZn1-xSeyS1-y heterostructured quantum dots (QDs) with chemical composition gradient. The synthesized QDs have either CdSe rich cores with ZnS rich shell or CdSe-CdS hybrid cores with ZnS rich shell, which are formed simply due to the differences in reactivities of the precursors. The obtained QDs were characterized using TEM, PL spectroscopy, UV-Vis, XRD and EDX. The heterostructured QDs emit brightly in the 478-603 nm spectral window and the emission wavelength is tunable by changing the crystal size and the precursor ratios. The photoluminescent emission peaks are narrow (FWHM ∼ 35 nm) due to the good size and shape uniformity of the particles.",
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AU - Gyóri, Z.

AU - Kónya, Z.

AU - Kukovecz, Á.

PY - 2014/11/27

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N2 - In this paper, we describe a one-pot synthesis method to produce CdxZn1-xSeyS1-y heterostructured quantum dots (QDs) with chemical composition gradient. The synthesized QDs have either CdSe rich cores with ZnS rich shell or CdSe-CdS hybrid cores with ZnS rich shell, which are formed simply due to the differences in reactivities of the precursors. The obtained QDs were characterized using TEM, PL spectroscopy, UV-Vis, XRD and EDX. The heterostructured QDs emit brightly in the 478-603 nm spectral window and the emission wavelength is tunable by changing the crystal size and the precursor ratios. The photoluminescent emission peaks are narrow (FWHM ∼ 35 nm) due to the good size and shape uniformity of the particles.

AB - In this paper, we describe a one-pot synthesis method to produce CdxZn1-xSeyS1-y heterostructured quantum dots (QDs) with chemical composition gradient. The synthesized QDs have either CdSe rich cores with ZnS rich shell or CdSe-CdS hybrid cores with ZnS rich shell, which are formed simply due to the differences in reactivities of the precursors. The obtained QDs were characterized using TEM, PL spectroscopy, UV-Vis, XRD and EDX. The heterostructured QDs emit brightly in the 478-603 nm spectral window and the emission wavelength is tunable by changing the crystal size and the precursor ratios. The photoluminescent emission peaks are narrow (FWHM ∼ 35 nm) due to the good size and shape uniformity of the particles.

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