Yang, Silicon Materials Used for Solar Cells
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Erice, Sept.18, 2007 Deren Yang
Silicon Materials Used for Sola
r CellsSilicon Materials Used for Sola
r Cells
Deren Yang
State Key Laboratory of Silicon MaterialsZhejiang University, China
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Erice, Sept.18, 2007 Deren Yang
State key lab of silicon
PV and Silicon industry
Research of silicon
Outline Outline
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Erice, Sept.18, 2007 Deren Yang
ShanghaiShanghai
HangzhouHangzhou
BeijingBeijingHangzhouHangzhou
State key lab of silicon State key lab of silicon
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Erice, Sept.18, 2007 Deren Yang
Human-being: 7000 year
City: 2000 years
Capital city: 800 years
3,000,000 population
West Lake
Hangzhou Hangzhou Capital of Zhejiang ProvinceCapital of Zhejiang Province
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Erice, Sept.18, 2007 Deren Yang
Zhejiang University
Built in 1897 (one of oldest)
One of top 5 university
Five campus
22 colleges, 60 departments
Nearly 40,000 students
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Erice, Sept.18, 2007 Deren Yang
Cz silicon used for IC,
specially nitrogen-doped CZ silicon Silicon used for solar cells Nanowire silicon Silicon based opto-electronic materials
19541954
State key lab of Silicon Materials
Zhejiang University
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Erice, Sept.18, 2007 Deren Yang
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Erice, Sept.18, 2007 Deren Yang
0100200300400500600700800900
1000
Sola
r Ce
lls(
MW)
1998 2000 2002 2004 2006
Year
In 2001, 4 MW solar cells and about 1% share of world.
~32% share of the world
In 2008, ~2580 MW solar cells, ~4000 MW capability
PV and Si in China PV and Si in China
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Erice, Sept.18, 2007 Deren Yang
0
500
1000
1500
2000
2500
3000
3500
4000
Ton
t(
)
1996 1998 2000 2002 2004 2006 2008
Year
Polycrystalline silicon Polycrystalline silicon
In 2002, 75 tons In 2008, ~4500 tons
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Erice, Sept.18, 2007 Deren Yang
Polycrystalline SiPolycrystalline Si
Line
In building
Planning
Capbility: ~ 100,000 t
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Erice, Sept.18, 2007 Deren Yang
0
1000
2000
3000
4000
5000
6000
Sili
con
t(
)
1996 1998 2000 2002 2004 2006
Year
Yield of Silicon for PVYield of Silicon for PV
CZ-Si: ~12,000 t
mc-Si:~ 12,000 t
2008, ~24,000
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Erice, Sept.18, 2007 Deren Yang
Crystal growth (CZ and multicrystalle-Si)
Defect and impurity (dislocation, grain boundary,oxygen, c
arbon, metals…)
Defect and impurity engineering (nitrogen-doping, german
ium doping)
materials issues during solar cell process (gettering,passiva
tion…)
Up-grade metallurgical silicon
….
Silicon Research Silicon Research
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Erice, Sept.18, 2007 Deren Yang
Solar Energy Material and Solar Cells, Vol.62, 37
Oxygen and carbon in mc-Si
Solar Energy Materials and Solar Cells, Vol.72, 133
Solid State Phenomena, Vol. 82, 2002, P.707-712 Solar Energy Materials and Solar Cells, Vol.72, 541
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Erice, Sept.18, 2007 Deren Yang
Aluminum in mc-Si
Eur. Phys. J. Appl. Phys.27, .119-122
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Erice, Sept.18, 2007 Deren Yang
New complex in mc-Si
Physica B 344, 1-4
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Erice, Sept.18, 2007 Deren Yang
Metal precipitation in mc-Si
Applied physics Letters, Vol.83,No.15, .3048-3050 Physica B 344.407-412 Semicond . Sci.Technol.19 ,299-305
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Erice, Sept.18, 2007 Deren Yang
Texturization in mc-Si
Renevable Energy 29 ,2101-2107 Solar Energy Materials&Solar Cells 77, 255-263 Semicond. Sci.Technol.19, 485-48
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Erice, Sept.18, 2007 Deren Yang
Grain boundary in mc-Si
J. Phys.: Condens. Matter 16 , S211-S216.
J. Appl. Phys. 96 , 5490-5495.
J. Appl. Phys. 97 , 033701.
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Erice, Sept.18, 2007 Deren Yang
PV and silicon industry is developing very fast in
China.
Czochralski, multicrystalline and up-grade metallu
rgical silicon have been investigated.
Growth, defect and impuries during crsyal growth
and solar cell process has been focused.
SummarySummary
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Erice, Sept.18, 2007 Deren Yang
Thank you!