High-Performance Quantum Dots with Synergistic Doping and Oxide Shell Protection Synthesized by Cation Exchange Conversion of Ternary-Composition Nanoparticles

Qiumei Di, Xiyue Zhu, Jia Liu, Xiaobin Zhang, Huishan Shang, Wenxing Chen, Jiajia Liu, Hongpan Rong, Meng Xu, Jiatao Zhang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The insertion of cation impurities into quantum dots (QDs) as a dopant has been proved to be an efficient way to tailor their optical, electronic, and magnetic properties; however, the low quantum yield (QY) and poor photostability strongly limit their further applications. We report a strategy to coat a thin oxide shell around the heterovalent doped QDs to enhance their QYs and photostabilities simultaneously. In the case of Ag+-doped CdS QDs, the controlled cation exchange reaction between Cd2+ and ternary Ag3SbS3 nanoparticles not only realizes the Ag+ doping in CdS QDs but also generates a thin Sb2O3 shell around the surface of the QDs. Enabled by such, as-prepared CdS:Ag@Sb2O3 QDs exhibited enhanced photostability and high QY of 66.5%. We envision that the findings presented here will inspire more novel protocols for advancing the practical applications of doped QDs.

Original languageEnglish
Pages (from-to)2606-2615
Number of pages10
JournalJournal of Physical Chemistry Letters
Volume10
Issue number10
DOIs
Publication statusPublished - 2019 May 16
Externally publishedYes

Fingerprint

Oxides
Semiconductor quantum dots
Cations
Ion exchange
Positive ions
quantum dots
Doping (additives)
Nanoparticles
cations
nanoparticles
oxides
Chemical analysis
Quantum yield
Electronic properties
insertion
Magnetic properties
Optical properties
Impurities
magnetic properties
optical properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Physical and Theoretical Chemistry

Cite this

High-Performance Quantum Dots with Synergistic Doping and Oxide Shell Protection Synthesized by Cation Exchange Conversion of Ternary-Composition Nanoparticles. / Di, Qiumei; Zhu, Xiyue; Liu, Jia; Zhang, Xiaobin; Shang, Huishan; Chen, Wenxing; Liu, Jiajia; Rong, Hongpan; Xu, Meng; Zhang, Jiatao.

In: Journal of Physical Chemistry Letters, Vol. 10, No. 10, 16.05.2019, p. 2606-2615.

Research output: Contribution to journalArticle

Di, Qiumei ; Zhu, Xiyue ; Liu, Jia ; Zhang, Xiaobin ; Shang, Huishan ; Chen, Wenxing ; Liu, Jiajia ; Rong, Hongpan ; Xu, Meng ; Zhang, Jiatao. / High-Performance Quantum Dots with Synergistic Doping and Oxide Shell Protection Synthesized by Cation Exchange Conversion of Ternary-Composition Nanoparticles. In: Journal of Physical Chemistry Letters. 2019 ; Vol. 10, No. 10. pp. 2606-2615.
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AU - Zhu, Xiyue

AU - Liu, Jia

AU - Zhang, Xiaobin

AU - Shang, Huishan

AU - Chen, Wenxing

AU - Liu, Jiajia

AU - Rong, Hongpan

AU - Xu, Meng

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