Piezoelectric Zno Nanostructure for Energy Harvesting, Volume 1

ISBN-13: 9781848217188 / Angielski / Twarda / 2015 / 144 str.

Yamin Leprince–Wang

Opis

Over the past decade, ZnO as an important II-VI semiconductor has attracted much attention within the scientific community over the world owing to its numerous unique and prosperous properties. This material, considered as a -future material-, especially in nanostructural format, has aroused many interesting research works due to its large range of applications in electronics, photonics, acoustics, energy and sensing. The bio-compatibility, piezoelectricity & low cost fabrication make ZnO nanostructure a very promising material for energy harvesting.

Spis treści

PREFACE ix

ACKNOWLEDGEMENTS xi

INTRODUCTION xiii

CHAPTER 1. PROPERTIES OF ZNO 1

1.1. Crystal structure of ZnO 1

1.2. Electrical properties of ZnO and Schottky junction ZnO/Au 3

1.3. Optical properties of ZnO 14

1.4. Piezoelectricity of ZnO 16

CHAPTER 2. ZNO NANOSTRUCTURE SYNTHESIS 21

2.1. Electrochemical deposition for ZnO nanostructure 22

2.1.1. Electrodeposition of monocrystalline ZnO nanowires and nanorods via template method 24

2.1.2. ZnO nanowire array growth via electrochemical road 29

2.2. Hydrothermal method for ZnO nanowire array grow 31

2.3. Comparative discussion on ZnO nanowire arrays obtained via electrodeposition and hydrothermal method 33

2.4. Influence of main parameters of hydrothermal method on ZnO nanowire growth morphology 36

2.4.1. Effect of the growth method 36

2.4.2. Effect of the growth solution pH value 38

2.4.3. Effect of the growth temperature 40

2.4.4. Effect of the growth time 41

2.5. Electrospinning method for ZnO micro/nanofiber synthesis 44

CHAPTER 3. MODELING AND SIMULATION OF ZNO–NANOWIREBASED ENERGY HARVESTING 49

3.1. Nanowire in bending mode 51

3.1.1. Influence of the nanowire length 54

3.1.2. Influence of the nanowire diameter 55

3.1.3. Influence of the aspect ratio 56

3.2. Nanowire in compression mode 57

3.2.1. Influence of the nanowire length 58

3.2.2. Influence of the nanowire diameter 59

3.2.3. Influence of the aspect ratio 59

3.3. Nanowire arrays in static and vibrational responses 61

3.3.1. Nanowire arrays in static and compressive responses 61

3.3.2. Nanowire arrays in periodic vibrational response 62

CHAPTER 4. ZNO–NANOWIRE– BASED NANOGENERATORS: PRINCIPLE, CHARACTERIZATION AND DEVICE FABRICATION 65

4.1. Working principle of nanogenerators 67

4.2. ZnO–nanowire–based energy harvesting device fabrication 75

4.3. ZnO–nanowire–based energy harvesting device characterization 81

4.4. ZnO–nanostructure–based hybrid nanogenerators 96

CONCLUSION 105

BIBLIOGRAPHY 109

INDEX 121