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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
Erice, Sept.18, 2007 Deren Yang
State key lab of silicon
PV and Silicon industry
Research of silicon
Outline Outline
Erice, Sept.18, 2007 Deren Yang
ShanghaiShanghai
HangzhouHangzhou
BeijingBeijingHangzhouHangzhou
State key lab of silicon State key lab of silicon
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
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
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
Erice, Sept.18, 2007 Deren Yang
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
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
Erice, Sept.18, 2007 Deren Yang
Polycrystalline SiPolycrystalline Si
Line
In building
Planning
Capbility: ~ 100,000 t
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
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
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
Erice, Sept.18, 2007 Deren Yang
Aluminum in mc-Si
Eur. Phys. J. Appl. Phys.27, .119-122
Erice, Sept.18, 2007 Deren Yang
New complex in mc-Si
Physica B 344, 1-4
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
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
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.
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
Erice, Sept.18, 2007 Deren Yang
Thank you!
