能量转换与存储原理教学资料-silicon-solar-cell-manufacturing共25页文档课件.ppt

南理工_电气设备故障诊断课程_第3章诊断技术中信号处理课件.ppt

1,电气设备故障诊断技术第三章 诊断技术中的信号处理方法,2,一概述二窄带干扰抑制自适应处理器三窄带干扰抑制频域处理四窄带干扰抑制小波分析五白噪抑制六脉冲干扰抑制七数据处理,第三章主要内容及安排,3,第3章 诊断技术中的信号处理,3.1 概,

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1、Guest Lectures,12. 1 Prof. Zhaosheng Li (Photo Electro-chemical Cells)12.4 Dr. Bin Zhu (Li-ion Battery),2,c-Si and mc-Si are made using similar processes,Multicrystalline Silicon (mc-Si) Produced via directional solidification.,Crystalline Silicon (c-Si) Can be made with CZ or FZ processes.,Si cryst。

2、al formation,wafer processing,PV Cell fabrication,Module,BOS + Installation,(wafer sawing mc-Si and c-Si),(wafer doping, surface etching, electrode deposition etc.),PV cell interconnects + bypass diodes, encapsulation, etc.,Cell and Module Manufacture,Metallurgical Grade Silicon,Metallurgical grade 。

初中道德与法治部编版万能答题公式方法思路整理汇总.doc

初中道德与法治答题技巧一答题公式1.初中道德与法治每课的结构是什么为什么怎么办这也是做每个习题的最基本思路。2.是什么含义表现特点形成种类不是每个必讲,用的不多,在做题的第一句话时需要点清是什么。3.为什么的别名作用意义重要性必要性危害性关,

3、Si (mg-Si) is made by heating sand with carbon in a furnace. SiO2 + 2C Si + 2CO 1 million metric tons/yr of mg-Si is made for steel and aluminummg-Si is 98-99 % pure. No shortage of mg-Si! Energy efficient process Lots of (very bad) impurities,6,Siemens Process for Electronic Semiconductor Grade (eg。

4、-Si) and Solar Grade Si (SoG-si),Si + 3HCl SiHCl3 + H2The boiling point of SiHCl3 is 31. 8 C.Multiple fractional distillations are used to make the SiHCl3 99.9999999% pure.The SiHCl3 is exposed to a heated Si rod.SiHCl3 + H2 Si + 3HClThis process consumes a lot of energy.,7,Making Single Crystal Ing。

5、ots: Czochralski Growth (CZ),The semiconductor grade Si is melted with the dopant (B). A seed crystal is then slowly pulled from the melt.Oxygen dopes (1018/cm3) Si ingot because the quartz crucible is partially dissolved.,Plummer Silicon VLSI Technology (Chapter 3),8,Making Single Crystal Ingots: F。

6、loat Zone (FZ),Need to use crack free polysilicon rods as the starting material. Higher quality crystals than CZ with few impurities.,Plummer Silicon VLSI Technology (Chapter 3),siliconsultant,9,Comparison Between FZ and CZ,siliconsultant,Multicrystalline Casting Processes,11,Directional Solidificat。

7、ion (DS),crystalsystems,18% mc-Si cell. in that square!,Most likely 12-14% efficient over a standard module size.,13,Ribbon Si,This approach has the potential to be cheaper, but produces polycrystalline Si. Takes about 90 minutes to produce two 6-foot long strips (time elapsed video on Evergreen web。

8、site) .,evergreensolar/app/en/technology/item/48,14,Comparison of most popular techniques,siliconsultant,15,Making Si Wafers,Archer & Hill, “Clean Electricity from Photovoltaics”, p. 167, Fig. 4.10.,Inside-diameter (ID) saw produces about 25 wafers/hour High-speed wire saws can produce about 500 waf。