Environmental Engineering Reference
In-Depth Information
P
P
Deposition from
the gas phase
Deposition from
the gas phase
Single crystal growing
by zone melting
Single crystal growing
by zone melting
Cutting into slices
Cutting into slices
p-Doping
p-Doping
P
O
2
N
2
P
O
2
N
2
p
p
p
p
n
n
p
p
Phosphorous glass
Diffusion within the gas phase
Phosphorous glass
Diffusion within the gas phase
Undopted silicon wafers
Undopted silicon wafers
Dry cleaning
Dry cleaning
n
n
n
n
n
n
n
n
n
n
p
Phosphorous glass
Plasma etching of
cell edges
p
Phosphorous glass
Plasma etching of
cell edges
p
p
p
p
n
n
Alloy contact
Silkscreen-printing
alloy contact
Alloy contact
Silkscreen-printing
alloy contact
Phosphorous glass etching
Phosphorous glass etching
Drying
Drying
N
2
N
2
N
2
N
2
O
2
O
2
O
2
O
2
n
n
n
n
n
n
n
n
FSC
FSC
p
p
p
p
p
p
p-Contact
p-Contact
Alloy contact
Alloy contact
RSC
RSC
RSC
RSC
p-Contact
p-Contact
RSC
RSC
Silkscreen-printing
rear side contact
Silkscreen-printing
rear side contact
Sintering
n-alloy contact
Sintering
n-alloy contact
Silkscreen-printing
front side contact
Silkscreen-printing
front side contact
Drying
Drying
Anti-reflecting
coating
Anti-reflecting
coating
FSC
FSC
Anti-reflecting coating
Front side contact
n-Diffusion layer
p-Base material
p-Alloy contact
Rear side contact
Anti-reflecting coating
Front side contact
n-Diffusion layer
p-Base material
p-Alloy contact
Rear side contact
n
n
p
p
p-Contact
p-Contact
RSC
RSC
Silkscreen-printing
anti-reflecting coating
Silkscreen-printing
anti-reflecting coating
Fig. 6.9
Scheme of the manufacturing steps of a silicon solar cell manufactured according
to the silk-screen process printing (FSC front side contact; RSC rear side contact; accord-
ing to /6-44/)
Sintering FSC / Anti-reflecting coating
Sintering FSC / Anti-reflecting coating
Electric serveying
Electric serveying
But both, mono-crystalline and poly-crystalline silicon allow achievement of
considerably higher efficiencies compared with those obtained by industrial
manufacturing today (Table 6.1). However, to exploit such enhanced efficiencies
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