Title

Tailoring Colloidal Quantum Dots Properties via Synthesis and Surface Engineering for Next-Generation Optoelectronic Applications

Alternative Title

차세대 광전자 응용을 위한 합성과 표면 공학을 통한 콜로이드 양자점 특성 조율

DGIST Authors

Taylor Derrick Allan ; Jong-Soo Lee ; Weon-Sik Chae

Advisor

이종수

Co-Advisor(s)

Weon-Sik Chae

Issued Date

2025

Awarded Date

2025-02-01

Citation

Taylor Derrick Allan. (2025). Tailoring Colloidal Quantum Dots Properties via Synthesis and Surface Engineering for Next-Generation Optoelectronic Applications. doi: 10.22677/THESIS.200000842818

Type

Thesis

Description

Colloidal quantum dots, colloidal synthesis, quantum dot structures, optical properties, ligand exchange

Table Of Contents

List of Contents

ABSTRACT. i
List of Contents ii
List of Tables v
List of Figures vi
CHAPTER 1. INTRODUCTION 1
1.1. Semiconductors and their impact on human lives 1
1.2. Nanotechnology, Nanoparticles and Nanocrystals (NCs) 2
1.3. History of Discovery and Synthesis of Colloidal Quantum Dots (CQDs) (Zero-
dimensional nanocrystals) 6
1.4. Properties of Quantum Dots 11
1.5. Types of QDs (Core only and core/shell QDs) 15
1.6. Basic Chemistry of Colloidal quantum dots (QDs) Synthesis 18
1.6.1. Role of solvent 19
1.6.2. Importance of the Choice of Precursor 20
1.6.3. Surface Capping ligands 21
1.7. Colloidal Synthesis Techniques 23
1.7.1. Hot injection method: 24
1.7.2. Heating up method: 26
1.7.3. Non-Classical Nucleation 28
1.8. Post Synthesis Treatments 28
1.8.1. Ligand engineering 29
1.9. Quantum Dots Characterization Techniques 31
1.10. Applications of Colloidal Quantum Dots 33
CHAPTER 2. 35
2.1. Importance of Surface Functionalization and Purification for Narrow FWHM and Bright Green-Emitting InP Core–Multishell Quantum Dots via a Two-Step Growth Process 36
2.1.1. Summary of this work 36
2.1.2. Introduction 36
2.1.3. Experimental Section 41
2.1.4. Results and Discussion 48
2.1.5. Conclusion 66
2.2. Colloidal Synthesis of thick-shelled CdSe/ZnS Quantum Dots for Optical Multilevel
Memory 2D-OD Hybrid Inverters 68
2.2.1. Summary 68
2.2.2. Introduction 69
2.2.3. Experimental Method 71
2.2.4. Results and Discussion 73
2.2.5. Conclusion 79
CHAPTER 3. 81
3.1. Insight into sulfur sources on the properties of AgInGaS2 Quantum Dots:
morphology and luminescence 82
3.1.1. Summary 82
3.1.2. Introduction 83
3.1.3. Experimental Procedure 86
3.1.4. Results and Discussion 90
3.1.5. Conclusion 101
CHAPTER 4. 102
4.1. Post-Synthesis Surface Modifications of Colloidal Quantum Dots: (Ligand exchange,
Purification and Photoluminescence Recovery) 103
4.1.1. Summary 103
4.1.2. Introduction 104
4.1.3. Experimental Procedure 107
4.1.4. Results and Discussions 113
4.1.5. Conclusion 130
4.2. References 131
요 약 문 153

URI

http://hdl.handle.net/20.500.11750/57976
http://dgist.dcollection.net/common/orgView/200000842818

DOI

10.22677/THESIS.200000842818

Degree

Doctor

Department

Department of Energy Science and Engineering

Publisher

DGIST

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