Semiconductor Nanocrystal Engineering by Applying Thiol- and Solvent-Coordinated Cation Exchange Kinetics

Bing Bai; Meng Xu; Nan Li; Wenxing Chen; Jiajia Liu; Jia Liu; Hongpan Rong; Dieter Fenske; Jiatao Zhang

doi:10.1002/anie.201807695

Semiconductor Nanocrystal Engineering by Applying Thiol- and Solvent-Coordinated Cation Exchange Kinetics

Bing Bai, Meng Xu, Nan Li, Wenxing Chen, Jiajia Liu, Jia Liu, Hongpan Rong, Dieter Fenske, Jiatao Zhang^*

^*Corresponding author for this work

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

37 Citations (Scopus)

Abstract

Thiol- and solvent-coordinated cation exchange kinetics have been applied to engineer the composition and crystallinity of novel nanocrystals. The detailed thermodynamics and kinetics of the reactions were explored by NMR spectroscopy, time-dependent photoluminescence (PL) characterizations and theoretical simulations. The fine structure of the colloidal semiconductor nanocrystals (CSNCs) was investigated by X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS). In this way, high-quality p-type Ag-doped ZnS quantum dots (QDs) and Au@ZnS hetero-nanocrystals with a cubic phase ZnS shell were synthesized successfully.The unprecedented dominant Ag ⁺ -dopant-induced fluorescence and p-type conductivity in the zinc-blende ZnS are reported.

Original language	English
Pages (from-to)	4852-4857
Number of pages	6
Journal	Angewandte Chemie - International Edition
Volume	58
Issue number	15
DOIs	https://doi.org/10.1002/anie.201807695
Publication status	Published - 1 Apr 2019

Keywords

cation exchange kinetics
colloidal semiconductor nanocrystals
doping
heterostructures
nanocrystal engineering

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10.1002/anie.201807695

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title = "Semiconductor Nanocrystal Engineering by Applying Thiol- and Solvent-Coordinated Cation Exchange Kinetics",

abstract = " Thiol- and solvent-coordinated cation exchange kinetics have been applied to engineer the composition and crystallinity of novel nanocrystals. The detailed thermodynamics and kinetics of the reactions were explored by NMR spectroscopy, time-dependent photoluminescence (PL) characterizations and theoretical simulations. The fine structure of the colloidal semiconductor nanocrystals (CSNCs) was investigated by X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS). In this way, high-quality p-type Ag-doped ZnS quantum dots (QDs) and Au@ZnS hetero-nanocrystals with a cubic phase ZnS shell were synthesized successfully.The unprecedented dominant Ag + -dopant-induced fluorescence and p-type conductivity in the zinc-blende ZnS are reported.",

keywords = "cation exchange kinetics, colloidal semiconductor nanocrystals, doping, heterostructures, nanocrystal engineering",

author = "Bing Bai and Meng Xu and Nan Li and Wenxing Chen and Jiajia Liu and Jia Liu and Hongpan Rong and Dieter Fenske and Jiatao Zhang",

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AU - Bai, Bing

AU - Xu, Meng

AU - Li, Nan

AU - Chen, Wenxing

AU - Liu, Jiajia

AU - Liu, Jia

AU - Rong, Hongpan

AU - Fenske, Dieter

AU - Zhang, Jiatao

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N2 - Thiol- and solvent-coordinated cation exchange kinetics have been applied to engineer the composition and crystallinity of novel nanocrystals. The detailed thermodynamics and kinetics of the reactions were explored by NMR spectroscopy, time-dependent photoluminescence (PL) characterizations and theoretical simulations. The fine structure of the colloidal semiconductor nanocrystals (CSNCs) was investigated by X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS). In this way, high-quality p-type Ag-doped ZnS quantum dots (QDs) and Au@ZnS hetero-nanocrystals with a cubic phase ZnS shell were synthesized successfully.The unprecedented dominant Ag + -dopant-induced fluorescence and p-type conductivity in the zinc-blende ZnS are reported.

AB - Thiol- and solvent-coordinated cation exchange kinetics have been applied to engineer the composition and crystallinity of novel nanocrystals. The detailed thermodynamics and kinetics of the reactions were explored by NMR spectroscopy, time-dependent photoluminescence (PL) characterizations and theoretical simulations. The fine structure of the colloidal semiconductor nanocrystals (CSNCs) was investigated by X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS). In this way, high-quality p-type Ag-doped ZnS quantum dots (QDs) and Au@ZnS hetero-nanocrystals with a cubic phase ZnS shell were synthesized successfully.The unprecedented dominant Ag + -dopant-induced fluorescence and p-type conductivity in the zinc-blende ZnS are reported.

KW - cation exchange kinetics

KW - colloidal semiconductor nanocrystals

KW - doping

KW - heterostructures

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Semiconductor Nanocrystal Engineering by Applying Thiol- and Solvent-Coordinated Cation Exchange Kinetics

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Keywords

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