Title

Synthesis and application of CdxHg1-xX based quantum dots with high quantum yield infrared photoluminescence

Alternative Title

높은 적외선 광발광 양자효율을 가지는 CdxHg1-xX 기반 양자점의 합성 및 응용

DGIST Authors

Gyudong Lee ; Jongmin Choi ; Sung Jun Lim

Advisor

최종민

Co-Advisor(s)

Sung Jun Lim

Issued Date

2023

Awarded Date

2023-08-01

Citation

Gyudong Lee. (2023). Synthesis and application of CdxHg1-xX based quantum dots with high quantum yield infrared photoluminescence. doi: 10.22677/THESIS.200000686731

Type

Thesis

Description

Infrared; Quantum dot; Photoluminescence quantum yield; Ripening reaction; Deep-tissue imaging

Table Of Contents

I. Introduction 1
1.1. QDs as NIR emitter 1
1.2. Various NIR emission QDs 3
1.2.1. Cd and Hg based QDs 3
1.2.2. Pb based QDs 3
1.2.3. In based QDs 4
1.2.4. Ag based QDs 4
1.2.5. Cu based QDs 5
1.3 Synthesis method of QDs 6
1.3.1. Hot-injection method 6
1.3.2. Heat-up method 7
1.3.3. Cation exchange 7
1.3.4. Shell overcoating 9
1.4. Summary 11
1.5 References 12
II. Design and synthesis of CdHgSe/HgS/CdZnS core/multi-shell quantum dots exhibiting high-quantum-yield tissue-penetrating shortwave infrared luminescence 19
2.1 Introduction 19
2.2 Results and discussion 21
2.2.1 Design of high-QY SWIR QDs 21
2.2.2 Synthesis of high-QY SWIR QDs 22
2.2.3 Preparation and surface structure of stable CdxHg1-xSe alloy QDs 24
2.2.4 Ligand-dependent thermodynamics of Cd-Hg cation exchange reactions 25
2.2.5 Structural characterization of high-QY SWIR QDs 27
2.2.6 Luminescence of aqueous- and polymer-soluble SWIR QDs 28
2.2.7 Quantitative deep-tissue SWIR imaging using SWIR QD/IP-L composites 29
2.3. Conclusion 34
2.4. Experimental section 35
2.5. References 44
III. Facile synthesis of giant CdHgSe/Cd(Hg)SeS core/shell quantum dots with large-Stokes-shift high-quantum-yield near-infrared photoluminescence via chlorine-mediated ripening 79
3.1 Introduction 79
3.2 Results and discussion 81
3.2.1 Synthesis of giant CdHgSe/Cd(Hg)SeS core/shell QDs via chlorine-mediated ripening 81
3.2.2 Characterization of optical properties of giant CdHgSe/Cd(Hg)SeS core/shell QDs 81
3.2.3 Characterization of structural properties of giant CdHgSe/Cd(Hg)SeS core/shell QDs 82
3.2.4 Mass analysis of giant CdHgSe/Cd(Hg)SeS core/shell QDs synthesis reaction product 83
3.2.5 Blinking properties of giant CdHgSe/Cd(Hg)SeS QD 84
3.3. Conclusion 86
3.4. Experimental section 87
3.5. References 92
Summary in Korean 103

URI

http://hdl.handle.net/20.500.11750/46403
http://dgist.dcollection.net/common/orgView/200000686731

DOI

10.22677/THESIS.200000686731

Degree

Doctor

Department

Department of Energy Science and Engineering

Publisher

DGIST

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