| Abstract | 第1-9页 |
| 摘要 | 第9-21页 |
| 1 Introduction | 第21-40页 |
| ·Photovoltaic Industry and Solar Cell Materials | 第21-23页 |
| ·Multicrystalline Silicon Solar Cells | 第23-27页 |
| ·Introduction to Multicrystalline Silicon Solar Cells | 第23-24页 |
| ·Advantages of Multicrystalline Solar Cells | 第24-25页 |
| ·Preparation of Multicrystalline Silicon Solar Cells | 第25-27页 |
| ·Incorporation of Impurities during Casting Process | 第27-33页 |
| ·Mechanism of Oxygen Incorporation | 第27-29页 |
| ·Harmful Effect of Oxygen in Silicon | 第29-31页 |
| ·Mechanism of Carbon Incorporation | 第31-32页 |
| ·Harmful Effect of Carbon in Silicon | 第32-33页 |
| ·Multicrystalline Silicon Ingot | 第33-35页 |
| ·Introduction of electron beam melting (EBM) | 第35-38页 |
| ·EBM Principle | 第35-36页 |
| ·Advantages of EBM | 第36-37页 |
| ·Removal of Volatile Impurities | 第37页 |
| ·Removal of Inclusions | 第37-38页 |
| ·Purpose and Content of the Thesis | 第38-40页 |
| 2 Experimental Equipment and Method | 第40-50页 |
| ·EBM Equipment | 第40-45页 |
| ·Melting Procedure | 第45-46页 |
| ·Sample Preparation and Cleaning Equipment | 第46-47页 |
| ·Material Analysis and Testing Equipment | 第47-50页 |
| 3 Removal of Oxygen from Silicon by EBM | 第50-68页 |
| ·Introduction | 第50页 |
| ·Theoretical Basis for Removal of Volatile Impurities | 第50-52页 |
| ·Experimental Details | 第52-53页 |
| ·Results of Oxygen Removal | 第53-58页 |
| ·Morphology of the Ingot | 第53-56页 |
| ·Impurity Content during EBM Process | 第56-58页 |
| ·Thermodynamics and Kinetics Analysis | 第58-67页 |
| ·Thermodynamic Analysis of Oxygen Removal | 第58-63页 |
| ·Mass Transfer Coefficient of Oxygen | 第63-65页 |
| ·Silicon Loss during Oxygen Removal Process | 第65-67页 |
| ·Summary | 第67-68页 |
| 4 Oxygen Removal from Silicon by Industrial-scale EBM | 第68-79页 |
| ·Introduction | 第68-69页 |
| ·Experimental Details | 第69-71页 |
| ·Oxygen Content and Distribution | 第71-74页 |
| ·Electrical Performance Evaluation | 第74-78页 |
| ·Life Time | 第74-75页 |
| ·Efficiency | 第75-78页 |
| ·Summary | 第78-79页 |
| 5 Redistribution of Carbon in Silicon by EBM | 第79-96页 |
| ·Introduction | 第79页 |
| ·Experimental Details | 第79-80页 |
| ·Analysis of Raw Material | 第80-84页 |
| ·Impurities in Raw Material | 第80-81页 |
| ·Microstructure Analysis | 第81-84页 |
| ·Distribution of Carbon after EBM Treatment | 第84-87页 |
| ·Discussion | 第87-95页 |
| ·Melt Temperature during EBM Process | 第87-91页 |
| ·Melt Viscosity | 第91-92页 |
| ·Existing State of Carbon in Silicon Melt | 第92-94页 |
| ·Redistribution Mechanism of Carbon in Silicon | 第94-95页 |
| ·Summary | 第95-96页 |
| 6 Carbon Removal from Silicon by Industrial-scale EBM | 第96-104页 |
| ·Introduction | 第96页 |
| ·Experimental Details | 第96-97页 |
| ·Analysis of Residue in Melting Crucible | 第97-100页 |
| ·SEM Analysis of Impurities after EBM | 第97-99页 |
| ·EDS Analysis of Impurities atter EBM | 第99-100页 |
| ·XRD Analysis of Impurities after EBM | 第100页 |
| ·Analysis of the Ingot in Solidification Crucible | 第100-103页 |
| ·Summary | 第103-104页 |
| Conclusions | 第104-106页 |
| Abstract of Innovation Points | 第106-107页 |
| References | 第107-116页 |
| Research Projects and Publications during PhD Period | 第116-117页 |
| Acknowledgement | 第117-118页 |
| Curriculum Vitae | 第118-120页 |
