Two-dimensional Material, Quantum Dot, Nanostructure, Transition Metal Dichalcogenide, Hybrid Photodetector
Table Of Contents
ABSTRACT i List of Contents ii List of Tables and Figures v 1. INTRODUCTION 1 1.1 Basic Theory of Low Dimensional Materials 1 1.1.1 Two-Dimensional(2D) Materials 3 1.1.2 Zero-Dimensional(0D) Materials 5 1.2 Low-Dimensional Transistor and Photodetector 8 1.2.1 Low-Dimensional Transistor 8 1.2.2 Low-Dimensional Photodetector 9 1.3 Hybrid Structure of Zero-Dimensional and Two-Dimensional with Application 12 1.3.1 0D and 2D hybrid Structure 12 1.3.2 0D and 2D hybrid Optoelectronic Application 12 1.4 References 15 2. High Electrical Performance Large-Scale Molybdenum Disulfide Field-Effect Transistor Fabricated with Various Dielectric Materials as the Back Gate 26 2.1 Introduction 26 2.1.1 Transition Metal Dichalcogenides (TMDCs) 26 2.1.2 Synthesis of TMDCs 28 2.1.3 Mechanism of CVD Process. 30 2.1.4 Type of CVD process 31 2.1.5 MOCVD process for large scale TMDCs 33 2.2 Experiment section 34 2.2.1 Materials 34 2.2.2 Growth of few-layer MoS2 35 2.2.3 Device Fabrication 35 2.2.4 Characterization and electrical measurement method 36 2.3 Results and discussion 37 2.3.1 Synthesis of large scale MoS2 37 2.3.2 Characteristics of large scale MoS2 38 2.3.3 Fabrication method 45 2.3.4 MoS2 FETs with Various Dielectric Materials as the Back Gate 48 2.4 Conclusion 51 2.5 References 52 3. Tunable Wavelength, Charge Carrier Transfer of Hybrid 0D-2D Lead halide Perovskite Quantum Dot-Molybdenum Disulfide Photodetectors 62 3.1 Introduction 62 3.2 Experiment section 64 3.2.1 Materials 64 3.2.2 Synthesis of PQDs 64 3.2.3 Bilayer MoS2 growth 66 3.2.4 Device fabrication 66 3.2.5 Characterization of optical and microstructure 67 3.2.6 Electrical and photocurrent measurement 69 3.3 Results and discussion 69 3.3.1 Characteristics of hybrid structure with PQDs and MoS2 69 3.3.2 Band alignment and charge transport of hybrid structure 72 3.3.3 Wavelength dependence of hybrid photodetector 76 3.3.4 Hybrid photodetector on 638 laser 78 3.4 Conclusion 85 3.5 References 86 4. Ag2Te/MoS2 hybrid photodetector with high detectivity and fast response in the infrared region 93 4.1 Introduction 93 4.2 Experiment section 95 4.2.1 Materials 95 4.2.2 Synthesis of Ag2Te QDs 95 4.2.3 Growth of few-layer MoS2 96 4.2.4 Device Fabrication 97 4.2.5 Characterization method for hybrid structure 97 4.2.6 Electrical and photocurrent measurement 98 4.3 Results and discussion 98 4.3.1 Characteristics of Ag2Te Quantum dots 98 4.3.2 Hybrid Structure of Ag2Te QDs and MoS2 101 4.3.3 Ag2Te/MoS2 hybrid IR photodetector 104 4.3.4 Response time of Ag2Te/MoS2 hybrid photodetector 108 4.4 Conclusion 111 4.5 References112 5. 요약문 117
