臺灣博碩士論文加值系統

This study presents the photodetector prepared by using Ni-doped ZnO, CNTDoped ZnO, and Ni/CNT-Doped ZnO, which was grown on glass substrate with seed
layer coating as the pretreatment and hydrothermal method. The ZnO nanorods were
grown with different concentration of doping. The surface analysis were done by FESEM and EDS shows the increase of concentration linier with the increase of diameter
of nanorods, respectively. The combination of Ni/CNT-doped exhibit the highest
switch ratio of 4046.51. Additionally, the presented photodetector not only reveals high
switch ratio but also demonstrates a stable output responses. It also exhibits good
responsitivity as well as quantum efficiency, altogether revealing full potential to be
used for practical applications.

This study presents the photodetector prepared by using Ni-doped ZnO, CNTDoped ZnO, and Ni/CNT-Doped ZnO, which was grown on glass substrate with seed
layer coating as the pretreatment and hydrothermal method. The ZnO nanorods were
grown with different concentration of doping. The surface analysis were done by FESEM and EDS shows the increase of concentration linier with the increase of diameter
of nanorods, respectively. The combination of Ni/CNT-doped exhibit the highest
switch ratio of 4046.51. Additionally, the presented photodetector not only reveals high
switch ratio but also demonstrates a stable output responses. It also exhibits good
responsitivity as well as quantum efficiency, altogether revealing full potential to be
used for practical applications.

CONTENT

Abstract i
Acknowledgement ii
Contents iii
List of Figures vi
List of Tables x

Chapter 1. Introduction
1.1. Background 1
1.2. Motivation Aims 4
1.3. Thesis Organization 4
Chapter 2. Literature Review 7
2.1. Introduction of ZnO nanorods 7
2.2. UV Photodetector Mechanism 8
Chapter 3. Experimental Procedure 11
3.1. Fabrication of ZnO Nanorods 14
3.1.1. Cleaning Substrate 15
3.1.2. Seed Layer Preparation 15
3.1.3. Seed Layer Coating 16
3.1.4. Hydrothermal Method 17
3.2. Characterization 18
3.2.1. Scanning Electron Microscopy (SEM) 18
3.2.2. EDS 18
3.2.4. Raman Spectroscopy 19
3.2.5. Photoluminescence (PL) 19
3. 3. Measurement 20
3.3.1. Photo-Dark Current Measurement 20
3.3.2. I-t Measurement 21
3.3.3. Responsitivity Measurement 21
3.3.4. Stability Measurement 21
Chapter 4. The study of structural and physical properties of bare ZnO Nanorods 22
4.1. Seed layer coating 22
4.2. Hydrothermal process 23
4.3. Bare ZnO characterization 23


Chapter 5. The study of Structural and Physical properties of Ni-Doped ZnO Nanorods 28
5.1. Seed layer effect on Different Ni doping Concentration 28
5.2. Hydrothermal Process with Different Ni Doping Concentration 29
5.3. Seed layer No Ni/Hydrothermal with different Ni concentration 31
5.4. Seed layer Ni 0.05g /Hydrothermal with different Ni concentration 37
5.5. Seed layer Ni 0.1g /Hydrothermal with different Ni concentration 43

Chapter 6. The study of Structural and Physical Properties of CNT-doped ZnO Nanorods 60
6.1. Seed layer effect on Different Ni doping Concentration 60
6.2. Hydrothermal Process with Different Ni Doping Concentration 60
6.3. Seed layer CNT 0.001g /Hydrothermal with different CNT concentration 62
6.4. Seed layer CNT 0.003g /Hydrothermal with different CNT concentration 71
6.5. Seed layer CNT 0.005g /Hydrothermal with different CNT concentration 79

6.6. Seed layer CNT 0.007g /Hydrothermal with different CNT concentration 87

Chapter 7. The Study of Structural and Physical Properties of Ni/CNT-Doped ZnO Nanorods 97
7.1. Seed layer effect on Different Ni doping Concentration 97
7.2. Hydrothermal Process with Different Ni Doping Concentration 97
7.3. Seed layer CNT 0.005g /Hydrothermal with Ni 0.1g and different CNT concentration 99
7.4. Seed layer Ni 0.05g and different CNT concentration /Hydrothermal with Ni 0.1g 106
7.5. Seed layer Ni 0.1g and different CNT concentration /Hydrothermal with Ni 0.1g 113

Chapter 8 Conclusion and Future Work 114
8.1. Conclusions 114
8.2. Future Works 115
References 116

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