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Applications of Photovoltaic Technologies

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Presentation on theme: "Applications of Photovoltaic Technologies"— Presentation transcript:

1 Applications of Photovoltaic Technologies

2 單(多)晶矽太陽能電池的製程技術 以規則性以及週期性進行三度空間分布地排列而成的鑽石結構

3 Si的結晶型態 非晶矽的、多晶矽的、以及單晶矽的三種不同的結晶型態

4 Solar PV Chain There are several steps from raw material to power systems MG-Si Silica Purification Casting Surface treatment assembly

5 矽的製造過程 矽 (Quartz) 冶金級矽 (MG-Si) 乙西爾製程 西門子製程 多晶矽原料 (Poly-Si) CZ Casting
Ribbon FZ 多晶矽 (mc-Si) 單晶矽 (sc-Si)

6 冶金級矽(MG-Si)的製程-1 冶金級矽材料的製程流程 - 碳熱還原製程法的示意圖

7 冶金級矽(MG-Si)的製程-2 碳熱還原製程 (Carbothermic Reduction Process) 主反應
SiO2(s)  2C(s)  Si(l)  2CO(g)  CO2(g) 副反應 Si(l)  1/2O2(g)  SiO(g) SiO(g)  1/2O2  SiO2(s)

8 冶金級矽(MG-Si)的製程-3 碳熱還原製程 (Carbothermic Reduction Process)
2SiO2(l)  SiC(s)  3SiO(g)  CO(g) SiO (g)  SiC(s)  2Si(l)  CO(g) 在外層低溫冷區:反應溫度小於1900C SiO(g)  2C  SiC(s)  CO(g) 2SiO(g)  Si(l)  SiO2(s)

9 冶金級矽(MG-Si) Si的純量約為98.5% 不存物如下所列

10 多晶矽原料(Poly-Si)的製程示意圖
鑄型壓碎製程 (Casting Scratch Process) 西門子(Simen)製程法的製作流程示意圖

11 多晶矽原料(Poly-Si)的製程-1 精煉製程 (Refining Process) 其主要的反應式如下:
3(SiO2)  4Al  3Si(l)  2(Al2O3) SiO2  2Ca  Si(l)  2(CaO) SiO2  2Mg  Si(l)  2(MgO) Si(l)  O2  (SiO2) 第五章 單晶矽及多晶矽太陽能電池 P 152

12 多晶矽原料(Poly-Si)的製程-2 鑄型壓碎製程 (Casting Scratch Process) 第一階段化學反應式
Si(s)3HClSiHCl3H2 Si(s)  4HCl  SiCl4  2H2 SiCl4  H2  SiHCl3  HCl 3SiCl4  2H2Si  4SiHCl3 2SiHCl3  SiCl4  Si  2HCl

13 多晶矽原料(Poly-Si)的製程-3 鑄型壓碎製程 (Casting Scratch Process) 第二階段化學反應式
2SiHCl3  SiH2Cl2  SiCl4 SiH2Cl2  Si  2HCl HSiCl3  H2  Si  3HCl HSiCl3  HCl  SiCl4  H2

14 多晶矽原料(Poly-Si)的製程示意圖
乙西爾製程法的製作流程示意圖

15 Solar cell – Sand to Si Silica Metallic Silica Refining
Tricholoro Silicane Deposition Polycrystalline Si Addition of B or P Single crystalline Si Single crystalline Si Wafer Melting Slicing Multi-crystalline Si Multi-crystalline Si wafer

16 單晶矽的製程技術 柴可夫斯基長晶法 (a) 以及浮動帶熔融長晶法 (b)

17 Czochralski (CZ) process: (CZ Si wafer)

18 Production of mc-Si mc-Si ingot Si melt Heat exchanger
Direction solidification Poly Si mc-Si ingot

19

20 Dicing of mc-Si mc-Si block 切塊(Dicing) 線鋸(Wire sawing) mc-Si wafer

21 Si ribbons (wafers) Wafer thickenss < 250 m Very low kerf loss
Reducing material consumption by: 1.Producing thinner wafers 2.Reducing kerf loss EFG growth Methods of producing Si ribbons 1.The edge defined film fed growth process (EFG) 2.Ribbon growth on substrate (RGS) 3.Silicon sheets from powder (SSP) SSP growth Si sheet from powder Wafer thickenss < 250 m Very low kerf loss Efficiency over 14%

22 結晶矽太陽電池製程步驟例(I) 1. 清洗蝕刻 2. 磷擴散 3. 鍍抗反射層 P-type wafer

23 結晶矽太陽電池製程步驟例(II) 4. 網印 5. 燒結

24 台灣太陽光電廠商供應情形


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