Market Trends, Materials & Manufacturing Processes
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PV 3. Crystalline Silicon Solar Cells
Low Temperature Process
Silicon Heterojunction
Better passivation (rear surface)
•
Optical losses
.
Similar manufacturing
High temperature processing
Aluminium Back Surface Field
(Al-BSF)
Front metal grid
ARC (SIN)
SiOx
(p) c-Si
ΑΙ
Passivated Emitter and Rear Contact
(PERC)
Front TCO
(SHJ)
Front metal grid
- i/p a-Si:H
(n) c-Si
<i/n a-Si:H
Front metal grid
ARC (SiNX)
Rear TCO
Rear metal grid
SiOX
n* emitter
(p) c-Si
BSF
ΑΙ
- SiO2 or Al2O3
SiNX
n* emitter
Challenges:
Optical losses reflection of
→
photons at rear surface
Recombination losses → at
metallic contact
Ohmic losses → high series
resistance at interfaces
BSF
High Temperature Process
High Temperature Passivating Contact
(HTPC)
Front metal grid
ARC (SiNX)
Siox
(p) c-Si
n* emitter
SiO2
ΑΙ
p+ polysilicon
Better passivation
EPFL
Simple manufacturing processes → no patterning
GoPV Project | SUMMER SCHOOL 10
PV SYSTEMS TECHNOLOGIES AND DESIGNView entire presentation