Title

Synthesis and Characterization of Ternary Colloidal Quantum Dots for Optoelectronics Applications

DGIST Authors

Somi Lee ; Jong-Soo Lee ; Weon-Sik Chae

Advisor

이종수

Co-Advisor(s)

Weon-Sik Chae

Issued Date

2023

Awarded Date

2023-08-01

Citation

Somi Lee. (2023). Synthesis and Characterization of Ternary Colloidal Quantum Dots for Optoelectronics Applications. doi: 10.22677/THESIS.200000684821

Type

Thesis

Description

Colloidal Quantum Dots; Nanoparticles; Hot-Injection method; Cation exchange; 2D-0D hybrid photodetector

Table Of Contents

Part I. Silver Indium Sulfide Colloidal Quantum Dots with Bandgap Tunable Emission via cation exchange 1
1. Introduction 2
2. Experiment Section 4
2.1. Materials 4
2.2. Synthesis of Ag-In-S2 (AIS) QDs 4
2.2.1. Preparation of S-precursor 4
2.2.2. Synthesis of AIS QDs 4
2.3. Fabrication of AIS/WSe2 hybrid photodetector 4
3. Characterization 6
4. Results and Discussion 8
5. Conclusion 19
Part II. Silver Indium (Gallium) Sulfide Colloidal Quantum Dots with Enhanced Luminescence properties via Ga3+ doping 20
1. Introduction 21
2. Experiment Section 23
2.1. Materials 23
2.2. Synthesis of Ag-In(-Ga)-S(AI(G)S) QDs 23
2.2.1. Preparation of Ga-precursor (Ga-oleate) 23
2.2.2. Preparation of S-precursor (ODE-S, TOP-S) 23
2.2.3. Synthesis of Ga(DDTC)3 23
2.2.4. Synthesis of AIS QDs via two-step heating reaction 24
2.2.5. Synthesis of AIGS QDs via single-step heating reaction 24
2.2.6. GaSx shell Formation on AI(G)S QDs via Ga+ doping 25
2.2.7. Zn-treatment with AI(G)S/GaSx QDs 25
2.3. Fabrication of (AIGS/GaSx)/MoS2 hybrid photodetector 25
3. Characterization 26
4. Results and Discussion 28
5. Conclusion 48
Reference 49

URI

http://hdl.handle.net/20.500.11750/46441
http://dgist.dcollection.net/common/orgView/200000684821

DOI

10.22677/THESIS.200000684821

Degree

Master

Department

Department of Energy Science and Engineering

Publisher

DGIST

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